GLOSSARY OF TERMS USED IN THE MANUAL AND ON 

 THE DESCRIPTIVE CHART 



Acid curd, coagulation of milk due to acid production. 



Adherent, applied to sporangium wall, indicates that remnants of sporangium remain 

 attached to endospore for some time. 



Aerobic, growing in the presence of free oxygen, strictly aerobic growing only in the 

 presence of free oxygen. 



Agglutinin, an antibody having the power of clumping suspensions of bacteria. 



Anaerobic, growing in the absence of free oxygen; strictly anaerobic, growing only in 

 the absence of free oxygen; facultative anaerobic, growing in both presence and 

 in absence of oxygen. 



Antibody, a speci6c substance produced by an animal in response to the introduction 

 of an antigen. 



Antigen, a substance which when introduced into an animal body, stimulates the 

 animal to produce speci6c bodies that react or unite with the substance intro- 

 duced. 



Antigenic action, behavior as an antigen. 



Antitoxin, an antibody having the power of uniting with or destroying a toxic sub- 

 stance. 



Arborescent, branched, tree-like growth. 



Aseptically, without permitting microbial contamination. 



Autotrophic, able to grow in absence of organic matter. 



Bacteriocidal, capable of killing bacteria. 



Bacteriostasis, preventing bacterial growth, but without killing the bacteria. 



Beaded, (in stab or stroke culture) separate or semi-confluent colonies along the line of 

 inoculation. 



Bipolar, at both poles or ends of the bacterial cell. 



Bleb, vesicle or blister-like swelling. 



Brittle, growth dry, friable under the platinum needle. 



Butyrous, growth of butter-like consistency. 



Capsule, an envelope surrounding the cell membrane of some kinds of bacteria. 



Chains, four or more bacterial cells attached end to end. 



Cbromogenesis, the production of color. 



Clavate, club-shaped. 



Compact, refers to sediment in the form of single fairly tenacious mass. 



Complement, a non-specific enzyme-like substance, destroyed if subjected to heat 

 (56°C or over for 30 minutes), which occurs in blood serum, and is necessarj-, in 

 conjunction with a specific antibody, in order to bring about cytolysis. 



Concentrically ringed, marked with rings, one inside the other. 



Contoured, an irregular, smoothly undulating surface, like that of a reUef map. 



Crateriform, a saucer-shaped liquefaction of the medium. 



Cuneate, wedge-shaped. 



Curled, composed of parallel chains in wavj- strands, as in anthrax colonies. 



Cytolysin, an antibody causing cytolysis. 



Cytolysis, a dissolving action on cells. 



Diastatic action, conversion of starch into simpler carbohydrates, such as dextrins or 

 sugars, by means of diastase. 



Diphtheritic, diphtheria-like. 



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