GLOSSARY. 



Abrasion. A spot rubbed bare of skin or mucous membrane. 



Accessory sinuses. Cavities in the bones of the skull, some 

 containing blood and some air. 



Aerobic. Requiring air or free oxygen for growth. 



Anaerobic. Able to live only in the absence of air or free 

 oxygen. 



Anemia. A condition in which the blood is lacking either in 

 quantity or quality. 



Aniline dyes. Colors derived by chemical process from coal- 

 tar. 



Animalcules. Very small animal organisms. 



Antitoxin. A proteid substance developed in the bodies of 

 man or animals that has the power of neutralizing 

 poisons. 



Arthritis. Inflammation of a joint. 



Bacillus (pi. bacilli). A rod-shaped organism belonging to 



the vegetable kingdom. 



Bactericidal. Possessing the power of destroying bacteria. 

 Bacterins. Killed bacteria suspended in fluid and injected 



under the skin in the treatment of some diseases. Also 



called vaccines. 



Bacteriology. The study of bacteria. 

 Bacteriolysins. Substances developed in the body which are 



capable of dissolving bacteria. 

 Bacterium (pi. bacteria). A unicellular organism belonging 



to the vegetable kingdom. 

 Binary fission. The method of multiplication of bacteria in 



which the organism splits in half. 



Carbohydrates. A compound composed of carbon, hydrogen, 

 and oxygen. 



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