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. 
Agglutinin. An antibody that has the power of clumping 
bacteria. 
Allergy. Hypersensitiveness of the body to foreign protein. 
Amboceptor. A thermostabile substance which on combination 
with complement and antigen produce cytolysis. 
Anaerobic. Able to live only in the absence of free air or 
oxygen. 
Analine dyes. Colors derived by chemical process from coal 
tar. 
Anemia. A condition in which the blood is lacking either in 
quality or quantity. 
Animalcules. Very small animal organisms. 
Antibody. Substances that protect from an infecting agent. 
Antigen. Any substance that produces antibodies. 
Antitoxin. A proteid substance developed in the body of man 
or animals that has the power of neutralizing poisons. 
Arthritis. Inflammation of a joint. 
Attenuation. The diminished power of an organism to pro¬ 
duce disease. 
Anaphylaxis. The induction of disease, as opposed to prophy¬ 
laxis. 
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. 
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