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C

Calculus

stone like deposits of mineral salts found in hollow organs or on the teeth. In the urethra they can result in blockage of the passage of urine.


Calling

persistent yowling exhibited by the female cat (queen) during the pro-oestrus period of the oestrous cycle


Canaliculus

a space containing a cytoplasmic process of an osteocyte in bone tissue, or a space between rows of cells in the liver along which bile flows


Capillary refill time

time taken for blood capillaries to refill after flow in them has been disrupted in some way


Carcinogenic

any agent or substance that can cause tumour formation and cancer


Cardiac

pertaining to the heart


Carnivore

meat-eating animal


Carrier

an individual who has a copy of a recessive gene that is not expressed because of heterozygosity, but the gene can be passed on to the next generation, alternatively, an individual, infected with a pathogen, but not showing any symptoms of disease.

Carriers

convalescent carrier: animal which has had a disease and recovered


Carrion

decaying flesh


Cassette

a light-proof container which holds X-ray film and intensifying screens in close contact

Catabolic reaction

a reaction in which chemical substances are broken down and energy is released


Cathode

negatively charged electrode which produces electrons

Cation

a positively charged particle


Caudal fermenter

herbivorous animal whose main microbial fermentation takes place in the large intestine


Cell

a structure bound by a plasma membrane, containing cytoplasm and organelles; the basic structural and functional unit of all living organisms.

Central Nervous System

the part of the nervous system that consists of the brain and the spinal cord


Centriole

an organelle composed of microtubules, that is involved in the formation of the spindle during mitosis


Centromere

the part of the chromosome to which spindle fibres attach during cell division


Cerebrospinal fluid

clear fluid produced in the choroid plexus of the ventricles of the brain. It is found in the brain and spinal cord. 


Chlamydia

bacterial agent that causes Chlamydia infection in cats


Chloroplasts

organelles, found in plant cells, which contain chlorophyll (green pigment). They are the sites of photosynthesis.


Chondrocyte

cell found in cartilage

Chromatid

two identical chromosomes, joined together by a centromere, formed during the interphase of the cell cycle


Chromatin

material within the nucleus of a eukaryotic cell which consists of DNA and histone proteins


Chromosome

thread-like structure made up of DNA and histones, containing a series of genes, found in the nucleus of a eukaryotic cell


Chronotrope

A drug that increases the rate of cardiac contraction


Chyle

fatty liquid absorbed from the small intestine by lymphatic capillaries known as lacteals


Chylothorax

lymphatic fluid in the pleural cavity


Chyme

partially digested food with an acid pH expelled from the stomach


Cilia

short hair-like structures found on the surfaces of some cells and organisms; used for either propelling trapped material out of the body or for locomotion

Cisternal puncture

obtaining a sample of cerebrospinal fluid from the cisterna magnum


Clotting time

time taken for blood to clot naturally


Codominance

both the alleles of a gene are expressed equally in the phenotype even though they may be different


Coitus

the act of mating


Collimation

the process of altering the size of the primary beam using a light beam diaphragm (LBD)

Colloid

a fluid where solid molecules are suspended in a liquid (but invisible to the naked eye). In fluid therapy, colloid fluids contain large molecules that remain in the circulation and therefore are plasma volume expanders.


Colonisation

the formation of compact population groups of the same type of microorganism


Commensal

living on or within another organism, and deriving benefit without harming or benefiting the host individual; an organism that causes neither harm nor benefit to the host


Compound follicle

hair follicle which consists of a primary hair follicle and several secondary hair follicles

Concentration gradient

the change in the concentration of a substance from one area to another


Conceptus

embryo or fetus plus the surrounding membranes and placenta


Conditionally essential nutrient

a nutrient that is normally not essential but becomes so, due to certain physiological or pathological conditions resulting in relative deficiency


Conditioned reflex

a reflex action which has been modified in response to experience or learning. For example, a dog may salivate when it sees its owner remove a tin opener from a drawer.

Conjugation

bacterial mating

Connective tissue

tissue that binds structures together, made up of cells and an intercellular matrix and its functions include support, protection and repair

Constipation

infrequent or difficulty passing of faeces


Contagion

the transmission of disease from one individual to another


Contagious

capable of being transmitted between animals by direct or indirect contact

Contamination

the soiling or making inferior by contact or mixture


Contrast

the difference in radiographic density between adjacent areas on a radiograph


Contrast media

substances which are introduced into the patient to increase or decrease radiopacity and contrast during an X-ray

Contrast study

a radiographic procedure which improves the contrast of the area under examination

Controlled drug

a drug whose use and possession  is controlled by legislation


Coprophagia

eating faeces


Coupage

percussion of the chest using cupped hands to aid removal of secretions


Cranial fermenter

herbivorous animal whose main microbial fermentation takes place in a modified stomach


Cranium

the skull containing the brain


Crossed grid

two parallel grids at right angles to each other

Crystalloid

a fluid containing small molecules which move quickly from the circulation


Cumulative

to build up


Cushing's disease

disease caused by excess adrenocortical hormones; hyperadrenocorticism


Cystitis

inflammation of the bladder


Cytokinesis

the division of the cytoplasm of a cell following division of the nucleus


Cytoplasm

a jelly-like material that surrounds the nucleus of a cell and contains most of the cell's organelles



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