Table of Contents
How to Use This Glossary
The terms below are organized by body system so you can jump to the section you need. Most of them describe a clinical sign — something observed or measured — rather than a diagnosis on their own.
For example, "dyspnea" describes difficulty breathing without saying why the patient is having trouble — the underlying cause (cardiac, respiratory, or otherwise) is determined separately and documented in the assessment section of the record. Keeping that distinction clear is part of what makes a note precise and defensible.
Cardiovascular Terms
- Tachycardia
- Abnormally fast heart rate
- Bradycardia
- Abnormally slow heart rate
- Arrhythmia
- Irregular heart rhythm
- Murmur
- Abnormal heart sound, often from turbulent blood flow
- CHF (Congestive Heart Failure)
- Heart's inability to pump effectively enough to meet the body's needs
Respiratory Terms
- Dyspnea
- Difficulty or labored breathing
- Tachypnea
- Abnormally fast breathing rate
- Cyanosis
- Bluish discoloration of tissue from low blood oxygen
- URI (Upper Respiratory Infection)
- Infection of the nose, throat, or upper airway
- Stertor / Stridor
- Abnormal, noisy breathing sounds (snoring-like vs. high-pitched)
Gastrointestinal Terms
- Emesis
- Vomiting
- Anorexia
- Loss of appetite
- Diarrhea
- Abnormally loose or frequent stool
- Melena
- Dark, tarry stool indicating digested blood
- Hematochezia
- Fresh (red) blood in the stool
- Regurgitation
- Passive expulsion of undigested food (distinct from active vomiting)
Dermatologic (Skin) Terms
- Pruritus
- Itching
- Alopecia
- Hair loss
- Erythema
- Redness of the skin
- Pyoderma
- Bacterial skin infection
- Lesion
- General term for any abnormal area of tissue
Musculoskeletal Terms
- Lameness
- Abnormal gait or difficulty bearing weight on a limb
- Crepitus
- A grinding sensation or sound within a joint
- Atrophy
- Wasting or shrinkage of muscle tissue
Neurologic Terms
- Ataxia
- Incoordination or loss of controlled movement
- Seizure
- Sudden, uncontrolled electrical disturbance in the brain causing involuntary movement/behavior change
- Paresis
- Partial weakness or incomplete paralysis
- Proprioception
- Awareness of limb position in space, commonly tested on neurologic exam
Urogenital Terms
- Dysuria
- Difficult or painful urination
- Polyuria
- Increased urination
- Pollakiuria
- Increased frequency of urination, often in small volumes
- Hematuria
- Blood in the urine
- Stranguria
- Straining to urinate
Ophthalmic (Eye) Terms
- Epiphora
- Excessive tearing
- Blepharospasm
- Involuntary eyelid closing, often a sign of pain
- Corneal ulcer
- An open sore on the cornea's surface
Common Clinical Terms (Cross-System)
- Pyrexia
- Fever
- Lethargy
- Reduced energy or activity level
- Cachexia
- Severe wasting or weight loss from chronic disease
- Edema
- Fluid swelling in tissue
- Icterus / Jaundice
- Yellow discoloration of tissue from elevated bilirubin
- Pallor
- Paleness of mucous membranes or skin
Copyable Terminology Cheat Sheet
Every term above in one block — copy it into a reference doc, a training packet, or print it for the treatment room.
Veterinary Terminology Cheat Sheet
All body systems in one copyable block
CARDIOVASCULAR TERMS
Tachycardia — Abnormally fast heart rate · Bradycardia — Abnormally slow heart rate · Arrhythmia — Irregular heart rhythm · Murmur — Abnormal heart sound, often from turbulent blood flow · CHF (Congestive Heart Failure) — Heart's inability to pump effectively enough to meet the body's needs
RESPIRATORY TERMS
Dyspnea — Difficulty or labored breathing · Tachypnea — Abnormally fast breathing rate · Cyanosis — Bluish discoloration of tissue from low blood oxygen · URI (Upper Respiratory Infection) — Infection of the nose, throat, or upper airway · Stertor / Stridor — Abnormal, noisy breathing sounds (snoring-like vs. high-pitched)
GASTROINTESTINAL TERMS
Emesis — Vomiting · Anorexia — Loss of appetite · Diarrhea — Abnormally loose or frequent stool · Melena — Dark, tarry stool indicating digested blood · Hematochezia — Fresh (red) blood in the stool · Regurgitation — Passive expulsion of undigested food (distinct from active vomiting)
DERMATOLOGIC (SKIN) TERMS
Pruritus — Itching · Alopecia — Hair loss · Erythema — Redness of the skin · Pyoderma — Bacterial skin infection · Lesion — General term for any abnormal area of tissue
MUSCULOSKELETAL TERMS
Lameness — Abnormal gait or difficulty bearing weight on a limb · Crepitus — A grinding sensation or sound within a joint · Atrophy — Wasting or shrinkage of muscle tissue
NEUROLOGIC TERMS
Ataxia — Incoordination or loss of controlled movement · Seizure — Sudden, uncontrolled electrical disturbance in the brain causing involuntary movement/behavior change · Paresis — Partial weakness or incomplete paralysis · Proprioception — Awareness of limb position in space, commonly tested on neurologic exam
UROGENITAL TERMS
Dysuria — Difficult or painful urination · Polyuria — Increased urination · Pollakiuria — Increased frequency of urination, often in small volumes · Hematuria — Blood in the urine · Stranguria — Straining to urinate
OPHTHALMIC (EYE) TERMS
Epiphora — Excessive tearing · Blepharospasm — Involuntary eyelid closing, often a sign of pain · Corneal ulcer — An open sore on the cornea's surface
COMMON CLINICAL TERMS (CROSS-SYSTEM)
Pyrexia — Fever · Lethargy — Reduced energy or activity level · Cachexia — Severe wasting or weight loss from chronic disease · Edema — Fluid swelling in tissue · Icterus / Jaundice — Yellow discoloration of tissue from elevated bilirubin · Pallor — Paleness of mucous membranes or skin
Educational reference only — clinical signs describe an observation, not a diagnosis on their own.
Frequently Asked Questions
What's the difference between a clinical sign and a diagnosis?
A clinical sign is an observation — something you can see, hear, or measure — while a diagnosis is the underlying condition causing it. "Dyspnea" describes labored breathing as an observation; it doesn't say why the patient is breathing that way. The assessment section of a SOAP note is where you connect signs like dyspnea to a differential diagnosis or diagnosis.
What does pruritus mean?
Pruritus means itching. It's a clinical sign commonly documented in dermatology cases and is often paired with observations like alopecia (hair loss), erythema (redness), or pyoderma (bacterial skin infection) to describe the full presentation.
What do polyuria and polydipsia mean together?
Polyuria means increased urination and polydipsia means increased water intake. The two are frequently documented together (sometimes abbreviated PU/PD) because they often occur as a pair and can point toward several underlying conditions — the combination itself is a clinical sign, not a diagnosis.
What's the difference between lethargy and obtunded?
Lethargy is a general term for reduced energy or activity level, commonly reported by an owner in the subjective history. Obtunded is a more specific mentation term used on exam to describe a dulled level of consciousness — see the mentation category on the veterinary abbreviations page for related terms like BAR, QAR, and ADR.
What does pyrexia mean?
Pyrexia means fever — an elevated body temperature above the typical reference range for the species and patient.
Why does consistent terminology matter in veterinary records?
A record is often read by someone other than the person who wrote it — another clinician, a referral hospital, or the same clinician months later. Using standard terminology instead of vague phrasing keeps findings unambiguous and makes the record useful to whoever reads it next.
Are these terms used the same way across species?
Generally yes — most of these terms describe a clinical sign (a physiological state or observation) rather than a species-specific diagnosis, so "tachycardia" or "dyspnea" mean the same thing whether the patient is a dog, cat, or horse. What changes by species is the reference range against which you judge whether a value is abnormal.
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Related Resources
Veterinary Abbreviations Reference
Categorized reference of common veterinary shorthand.
TPR in Veterinary Medicine
Temperature, pulse, and respiration reference ranges by species.
Veterinary SOAP Note Template
Free copyable SOAP templates for canine and feline visits.
How to Write a Veterinary SOAP Note
Step-by-step guide with a worked example.