330 Glossary 



independent vital activities. A morphological or structural 

 unit of an organism. 



Chronic. — Long continued but not acute. 



Cleavage. — The division of the cells of an embryo. 



Cloaca. — The enlarged portion of the alimentary canal just before 

 the vent. The intestine, the ureters (tubes from the kidneys) 

 and the oviduct open into the cloaca. 



Concrement. — A lump or mass formed by successive additions. 



Congestion. — Excessive or abnormal accumulation of blood in a 

 part or organ. 



Conjunctiva. — The dehcate membrane that lines the eyehds and 

 covers the eyeball in front. 



Contagious. — A disease which is communicable by direct contact. 



Copulation. — Sexual intercourse. With fowls "treading." 



Cornea. — The hard transparent structure forming the anterior part 

 of the eyeball. 



Cranium. — • The brain case. 



Creolin. — A thick black liquid coal tar preparation. It has anti- 

 septic properties. 



Cresol. — A coal tar product with antiseptic and germicidal proper- 

 ties. 



Cyst. — A sac-like growth which usually contains a liquid or a semi- 

 solid. 



Demulcent. — A soothing mucilaginous or oily medicine. 



Dermoid cyst. — A form of congenital cyst often containing skin- 

 like structures. 



Diuretic. — • A medicine that increases the activity of the kidnej^s. 



Dorsal. — Pertaining to the back. 



Ecchytnoscs (ek-kim-o-ses). — Discoloration of the skin caused by 

 blood outside of the blood vessels as in a bruise. 



Emaciated. — Very lean or wasted condition of the body. 



Enema. — A liquid injection in the rectum or cloaca. 



Enteritis. — Inflammation of the intestine. In human medicine 

 confined chiefly to the small intestine. 



Epidemic. — A disease that is widelj^ prevalent in a community or 

 locality. 



Epidermis. — The outer or non-vascular layer of the skin. The 

 cuticle. 



Epithelioma. — A cancer or malignant tumor consisting chiefly of 

 cells derived from the skin or mucous membrane. 



Epithelium. — The covering or outer layer of the skin and mucous 

 membranes. 



Epizootic. — Occurring as an epidemic disease among animals. 



Ergot. — A fungus which affects and finally replaces the seed of a 



