GLOSSARY OF TERMS USED ON THE CHARTS AND IN THE MANUAL 301 



Echinulate, growth with toothed or pointed margins along line of 



inoculation. 

 Edema, intercellular accumulation of abnormally large amounts of 



fluid in a part of an animal body. 

 Effuse, growth thin, veily, unusually spreading. 

 Eldredge tube, a double-compartment culture tube for collecting carbon 



dioxide given off during growth of a culture. 

 Ellipsoid, ovate or ovoid (egg-shaped) ; elHptical in longitudinal section. 

 Elliptical, same as elHpsoid. 

 Endospore, thick-walled spore formed within the bacterial cell, i.e., 



typical bacterial spores like those of Bacillus anthracis or B. subtilis. 

 Entire, applied to colonies, indicates a smooth margin. 

 Erose, irregularly notched. 

 Erythrocyte, red blood corpuscle. 

 Excentric, shghtly to one side of the center, between the positions denoted 



central and subterminal. 

 Facultative anaerobe, see Anaerobic. 

 Fibrinolysin, an enzyme which dissolves fibrin. 

 Filamentous, growth composed of long, irregularly placed or interwoven 



threads. 

 Filaments, applied to morphology of bacteria, refers to threadlike forms, 



generally unsegmented; if segmented, the organisms are enclosed 



in a sheath. 

 Filiform, in stroke or stab cultures, a uniform growth along line of 



inoculation. 

 Flagellum (pi. -la), a flexible, whiplike attachment used as an organ of 



locomotion. 

 Flaky, refers to sediment in the form of numerous separate flakes. 

 Flat, lying in one plane, as a thin colony. 

 Flocculent, containing small adherent masses of various shapes floating 



in the fluid. 

 Fluorescent, having one color by transmitted light and another by 



reflected light. 

 Gonidia, a type of asexual spores. 

 Gonidial (phase), referring specifically to a bacterial stage producing 



gonidialike bodies. 

 Gram (stain), a differential stain for bacteria, based on a method of 



Christian Gram. 

 Granular, composed of small particles or granules. 

 Habitat, the place where an organism normally lives under natural 



conditions. 

 Hemolysin, a substance causing hemolysis, either alone or in presence of 



complement. 



