Veterinary Glossary for Dog Owners

acanthosis

Thickening of the outer layer of the skin, often due to chronic irritation or hormonal imbalances.

acholia

Absence of bile pigments in stool, often causing pale or gray feces and suggesting reduced bile flow.

adenoma

A benign tumor arising from glandular tissue.

alanine aminotransferase (ALT)

An enzyme produced by liver cells; elevated levels in blood may indicate liver damage.

alkaline phosphatase (ALP)

An enzyme found in liver, bone, and other tissues; elevated levels may indicate liver disease or bone growth.

alkalosis

A condition where the blood pH is higher than normal, often due to loss of acids or excess base.

anaplasmosis

A tick-borne bacterial disease causing fever, anemia, and loss of appetite in dogs.

anastomosis

The surgical joining of two structures, such as blood vessels or intestines.

anemia

A reduction in the number of red blood cells or hemoglobin, leading to fatigue and weakness.

aponeurosis

A flat sheet of fibrous tissue that acts as a tendon to attach muscles to bone.

arthritis

Inflammation of joints causing pain and reduced mobility, often leading to behavioral changes like reluctance to play or jump.

arthroplasty

Surgical reconstruction or replacement of a joint to relieve pain and restore function.

arthroscopy

A minimally invasive procedure to examine and treat joint issues using a small camera and instruments.

arthrosis

Degenerative joint disease, often synonymous with osteoarthritis.

aspartate aminotransferase

An enzyme found in liver and muscle; elevated levels indicate tissue damage.

aspergillosis

A fungal infection typically affecting the respiratory system, caused by Aspergillus species.

azotemia

Elevated levels of nitrogenous waste in the blood, indicating kidney dysfunction.

babesiosis

A tick-borne protozoal disease causing anemia and fever in dogs.

blastomycosis

A systemic fungal infection affecting lungs, skin, and bones, caused by Blastomyces dermatitidis.

blood urea nitrogen (BUN)

A measure of kidney function; elevated levels indicate reduced kidney efficiency.

borreliosis

Another term for Lyme disease, caused by Borrelia burgdorferi bacteria transmitted by ticks.

bronchitis

Inflammation of the bronchi, often causing coughing and difficulty breathing.

brucellosis

A bacterial infection causing reproductive issues, such as abortions in dogs.

carcinoma

A malignant tumor arising from epithelial tissue.

cardiomyopathy

Disease of the heart muscle, leading to weakened pumping ability.

complete blood count (CBC)

A blood test evaluating red and white blood cells, platelets, and hemoglobin levels.

cellulitis

Inflammation of cellular or connective tissue under the skin, often due to bacterial infection.

coccidioidomycosis

A fungal infection (valley fever) affecting lungs and other organs, common in arid regions.

coccidiosis

Intestinal infection caused by coccidia protozoa, leading to diarrhea in young animals.

colitis

Inflammation of the colon (large intestine), leading to frequent small amounts of stool with mucus, blood, or straining; often from stress, parasites, or diet.

colonoscopy

Endoscopic examination of the colon to diagnose gastrointestinal issues.

coma

A state of deep unconsciousness from which the animal cannot be aroused.

conjunctivitis

Inflammation of the conjunctiva (pink eye), causing redness and discharge.

cranial cruciate ligament (CCL/ACL)

A ligament in the knee joint; rupture causes lameness and instability.

cranioplasty

Surgical repair of a defect in the skull.

cyanosis

Bluish discoloration of skin and mucous membranes due to low oxygen levels.

cystitis

Inflammation of the urinary bladder, often causing frequent and painful urination.

degenerative myelopathy

A progressive spinal cord disease causing weakness and incoordination in hind limbs.

dermatitis

Inflammation of the skin, often due to allergies, infections, or irritants.

dermatomyositis

An autoimmune disease affecting skin and muscles, causing rashes and weakness.

dermatophilosis

A bacterial skin infection (rain rot) causing crusty lesions, common in wet conditions.

dermatophytosis

Fungal skin infection (ringworm), causing circular hair loss and scaly skin.

diskospondylitis

Infection of the intervertebral disks and adjacent vertebrae, causing back pain.

dysbiosis

Imbalance in the gut microbiome, leading to digestive issues.

dyslipidemia

Abnormal levels of lipids in the blood, associated with metabolic disorders.

ehrlichiosis

A tick-borne bacterial disease causing fever, joint pain, and low platelet count.

encephalitis

Inflammation of the brain, often due to infection or immune-mediated causes.

encephalopathy

Disease or dysfunction of the brain, leading to neurological symptoms.

endoscopy

A procedure using a flexible camera to examine internal organs or cavities.

endotoxemia

Presence of bacterial toxins in the blood, often leading to shock.

enteritis

Inflammation or infection of the small intestine, which can cause bloody stool and other digestive upset.

enteropathy

Disease of the intestines, affecting digestion and absorption.

exocrine pancreatic insufficiency (EPI)

Failure of the pancreas to produce digestive enzymes, causing weight loss, large stools, and nutrient malabsorption.

fasciitis

Inflammation of the fascia, the connective tissue surrounding muscles.

fibrosarcoma

A malignant tumor arising from fibrous connective tissue.

fibrosis

Formation of fibrous scar tissue, often in response to injury or inflammation.

folliculitis

Inflammation of hair follicles, causing pustules and hair loss.

gastritis

Inflammation of the stomach lining, causing vomiting and abdominal pain.

gastroenteritis

Inflammation of the stomach and intestines, often causing vomiting and diarrhea.

giardia

An intestinal parasite that commonly causes diarrhea, gas, and greasy stools, especially in dogs exposed to contaminated water.

gingivitis

Inflammation of the gums, often the first stage of periodontal disease.

glaucoma

Increased pressure within the eye, leading to vision loss if untreated.

granuloma

A mass of chronic inflammatory tissue, often due to persistent infection or foreign body.

halitosis

Bad breath, often due to dental disease or digestive issues.

hemangioma

A benign tumor of blood vessels, often appearing as a red skin lesion.

hemangiosarcoma

A malignant tumor of blood vessel cells, often aggressive and metastatic.

hematoma

A localized collection of blood from a ruptured vessel, often causing swelling.

hemilaminectomy

Surgical removal of part of a vertebra to relieve spinal cord pressure.

hemoglobinemia

Presence of hemoglobin in the blood plasma, indicating red blood cell destruction.

hemorrhagic gastroenteritis (HGE)

Sudden severe vomiting and bloody diarrhea from acute intestinal inflammation; can cause dangerous dehydration and shock.

hepatitis

Inflammation of the liver, caused by viruses, toxins, or autoimmune disease.

hepatozoonosis

A tick-borne protozoal disease affecting muscles and bones in dogs.

histiocytoma

A benign skin tumor common in young dogs, often regressing spontaneously.

histiocytosis

Abnormal proliferation of histiocytes, which can be benign or malignant.

histoplasmosis

A fungal infection from bird or bat droppings, affecting lungs and other organs.

homeopathy

An alternative therapy using highly diluted substances to stimulate healing.

hygroma

A fluid-filled swelling over a joint, often from repeated trauma.

hypercalcemia

Elevated calcium levels in the blood, often due to cancer or parathyroid issues.

hyperglycemia

High blood sugar levels, common in diabetes mellitus.

hyperkalemia

Elevated potassium levels in the blood, potentially causing heart arrhythmias.

hyperkeratosis

Thickening of the outer skin layer, often on paw pads or nose.

hyperlipidemia

Elevated fat levels in the blood, associated with certain breeds or diets.

hypoglycemia

Low blood sugar levels, causing weakness, seizures, or coma.

hypokalemia

Low potassium levels in the blood, leading to muscle weakness.

hypoproteinemia

Low protein levels in the blood, often due to loss or malnutrition.

inflammatory bowel disease

Chronic inflammation of the gastrointestinal tract, causing diarrhea and vomiting.

insulinoma

A tumor of insulin-producing cells, causing low blood sugar.

ischemia

Lack of blood supply to a tissue, leading to damage or death.

keratoconjunctivitis

Inflammation of the cornea and conjunctiva, often due to infection.

keratosis

Thickening or hardening of the skin due to excess keratin.

ketoacidosis

A serious complication of diabetes with high ketones and acidosis.

ketosis

Accumulation of ketones in the body, often in diabetic or fasting animals.

laminectomy

Surgical removal of the lamina of a vertebra to access the spinal cord.

laparoscopy

Minimally invasive surgery using a camera and instruments through small incisions.

laryngitis

Inflammation of the larynx, causing hoarseness or loss of voice.

leptospirosis

A bacterial disease affecting liver and kidneys, transmitted through urine-contaminated water.

leukemia

Cancer of the white blood cells, leading to immune suppression and anemia.

leukocytosis

Increased number of white blood cells, often indicating infection or inflammation.

lipidosis

Abnormal accumulation of fat in tissues, such as hepatic lipidosis in the liver.

lipoma

A benign tumor of fat cells, usually subcutaneous.

liposarcoma

A malignant tumor arising from fat cells.

lumpectomy

Surgical removal of a lump or tumor.

lymphadenopathy

Enlargement of lymph nodes, often due to infection or cancer.

lymphoma

Cancer of the lymphatic system, affecting lymph nodes and organs.

lymphosarcoma

An older term for lymphoma, cancer of lymphoid tissue.

megaesophagus

Abnormal dilation and decreased motility of the esophagus, causing regurgitation and difficulty swallowing.

megacolon

Severe dilation of the colon resulting in chronic constipation and difficulty passing stool.

melanoma

A tumor arising from melanocytes, often malignant in dogs.

melena

Black, tarry stool caused by digested blood, usually from bleeding in the upper gastrointestinal tract.

meningioma

A tumor of the meninges, the membranes covering the brain and spinal cord.

meningitis

Inflammation of the meninges, often causing neck pain and fever.

meningoencephalitis

Inflammation of the brain and meninges.

meningoencephalomyelitis

Inflammation of the brain, meninges, and spinal cord.

myelolipoma

A benign tumor composed of bone marrow and fat tissue.

myelopathy

Disease of the spinal cord, causing neurological deficits.

myocarditis

Inflammation of the heart muscle, often due to infection.

myopathy

Disease of the muscles, leading to weakness or atrophy.

myositis

Inflammation of muscles, causing pain and weakness.

myxoma

A benign tumor of connective tissue containing mucous or gelatinous material.

naturopathy

A system of alternative medicine using natural remedies to support healing.

necrosis

Death of tissue, often due to loss of blood supply.

neosporosis

A protozoal disease causing neuromuscular issues, transmitted from dogs to other animals.

nephritis

Inflammation of the kidneys, affecting filtration function.

neuropathy

Disease or damage to nerves, causing weakness or numbness.

orthosis

A brace or support device to stabilize a limb or joint.

ostectomy

Surgical removal of bone or part of a bone.

osteoarthritis

Degenerative joint disease causing pain, stiffness, and reduced mobility.

osteoarthrosis

Non-inflammatory degenerative joint disease, similar to osteoarthritis.

osteochondritis

Inflammation of bone and cartilage, often in growing animals.

osteomyelitis

Infection of the bone, often causing pain and lameness.

osteoporosis

Loss of bone density, making bones fragile and prone to fractures.

osteosarcoma

A malignant bone cancer, often affecting limbs in large breeds.

osteotomy

Surgical cutting of bone to correct deformities or injuries.

otitis

Inflammation of the ear, often causing pain, discharge, and head shaking.

ovariohysterectomy

Surgical removal of the ovaries and uterus (spay).

pancreatitis

Inflammation of the pancreas, causing a dog to hide, withdraw, show tiredness, and experience vomiting or weight loss.

panosteitis

Self-limiting bone inflammation in young large-breed dogs, causing lameness.

papilloma

A benign tumor (wart) caused by papillomavirus.

penicilliosis

A fungal infection caused by Penicillium species, rare in dogs.

pericarditis

Inflammation of the pericardium, the sac around the heart.

periodontitis

Advanced gum disease leading to tooth loss and bone damage.

peritonitis

Inflammation of the peritoneum, the abdominal cavity lining, often due to rupture or infection.

pharyngitis

Inflammation of the pharynx, causing sore throat and difficulty swallowing.

pododermatitis

Inflammation of the foot skin, often causing lameness.

polyarthropathy

Disease affecting multiple joints, often immune-mediated.

polymyositis

Inflammation of multiple muscles, causing weakness and pain.

polyneuropathy

Disease affecting multiple peripheral nerves, leading to weakness.

polyradiculoneuritis

Inflammation of nerve roots, causing acute flaccid paralysis (coonhound paralysis).

prognosis

The predicted outcome of a disease or condition.

proptosis

Protrusion of the eyeball from the socket, often due to trauma.

prostatitis

Inflammation of the prostate gland, causing urinary issues in males.

pseudoarthrosis

A false joint formed after a fracture fails to heal properly.

rhinitis

Inflammation of the nasal mucous membranes, causing sneezing and discharge.

rhinopneumonitis

A viral respiratory disease in horses, similar to kennel cough in dogs.

rhinoscopy

Endoscopic examination of the nasal cavity.

rhinotracheitis

Viral upper respiratory infection in cats, causing sneezing and eye discharge.

salmonellosis

Bacterial infection causing diarrhea, fever, and abdominal pain.

sarcoma

A malignant tumor arising from connective tissue.

sclerosis

Hardening of tissue due to scarring or calcification.

septicemia

Bacterial infection in the bloodstream, leading to systemic illness.

seroma

Accumulation of serum under the skin, often after surgery.

splenectomy

Surgical removal of the spleen.

spondylitis

Inflammation of the vertebrae.

spondylosis

Degenerative changes in the spine, forming bony bridges between vertebrae.

steatosis

Accumulation of fat in the liver or other tissues.

stenosis

Narrowing of a passage or opening, such as a valve or artery.

stoma

A surgically created opening in the body, such as a colostomy.

sulcoplasty

Surgical deepening of a groove, often for patellar luxation correction.

synovitis

Inflammation of the synovial membrane lining joints.

tendinitis

Inflammation of a tendon, causing pain and lameness.

teratoma

A tumor containing multiple tissue types, such as hair or teeth.

thyroiditis

Inflammation of the thyroid gland, often autoimmune.

tonsillectomy

Surgical removal of the tonsils.

tonsillitis

Inflammation of the tonsils, causing throat pain and difficulty swallowing.

toxicosis

Poisoning or adverse reaction to a toxic substance.

tracheobronchitis

Inflammation of the trachea and bronchi (kennel cough).

trichoepithelioma

A benign tumor arising from hair follicle epithelium.

trochleoplasty

Surgical modification of the trochlear groove for patellar luxation correction.

uremia

Accumulation of waste products in the blood due to kidney failure.

urinalysis

Laboratory analysis of urine to detect abnormalities or diseases.

uveitis

Inflammation of the uvea, the middle layer of the eye.

vaccinosis

Adverse reaction or chronic condition attributed to vaccination.

vaginitis

Inflammation of the vagina, causing discharge and discomfort.

vaginoscopy

Endoscopic examination of the vagina.

vasculitis

Inflammation of blood vessels, often immune-mediated.

vasculopathy

Disease of the blood vessels.

vestibulitis

Inflammation of the vestibular system, causing balance issues.

vulvovaginitis

Inflammation of the vulva and vagina.

If you’d like a complete veterinary glossary for dog owners beyond this page, go and grab Dictionary of Veterinary Terms by Dr. Jennifer Coates, DVM, one of our contributing authors.

Dictionary of Veterinary Terms: Vet Speak Deciphered for the Non Veterinarian by Dr. Jennifer Coates
Dictionary of Veterinary Terms: Vet Speak Deciphered for the Non-Veterinarian

Written in a dictionary reference style format, just about every term the vet will ever use is thoroughly explained and easy to understand. This book is a must-have in the home of every pet owner and breeder!

Prior to graduating from veterinary school, Jennifer worked as a veterinary receptionist, assistant, and technician. It was then that she became aware of the frustration caused by veterinary jargon.

The skill and knowledge gained through years spent immersed in all aspects of veterinary care gave Jennifer an exceptional perspective from which to write the Dictionary of Veterinary Terms.