286 CLEAN MILK 



DIASTAS1C ACTION, same as D I ASTATIC, conversion of starch into water- 

 soluble substances by diastase. 

 ECHINULATE, in agar stroke a growth along line of inoculation, with toothed 

 or pointed margins ; in stab cultures growth beset with pointed outgrowths. 

 EFFUSE, growth thin, veily, unusually spreading. 

 ENTIRE, smooth, having a margin destitute of teeth or notches. 

 EROSE, border irregularly toothed. 



FILAMENTOUS, growth composed of long, irregularly placed or interwoven fila- 

 ments. 

 FILIFORM, in stroke or stab cultures a uniform growth along line of inoculation. 

 FIMBRIATE, border fringed with slender processes, larger than filaments. 

 FLOCCOSE, growth composed of short curved chains, variously oriented. 

 FLOCCULENT, said of fluids which contain pseudozoogloeae, i. e., small ad- 

 herent masses of bacteria of various shapes and floating in the culture fluid. 

 FLUORESCENT, having one color by transmitted light and another by reflected 



light. 

 GRAM'S STAIN, a method of differential bleaching after gentian violet, methyl 

 violet, etc. The + mark is to be given only when the bacteria are deep 

 blue or remain blue after counterstaining with Bismark brown. 

 GRUMOSE, clotted. 



INFUNDIBULIFORM, form of a funnel or inverted cone. 

 IRIDESCENT, like mother-of-pearl. The effect of very thin films. 

 LACERATE, having the margin cut into irregular segments as if torn. 

 LOBATE, border deeply undulate, producing lobes (see undulate) . 

 LONG, many weeks, or months. 

 MAXIMUM TEMPERATURE, temperature above which growth does not take 



place. 

 MEDIUM, (time) several weeks. 



MEMBRANOUS, growth thin, coherent, like a membrane. 

 MINIMUM TEMPERATURE, temperature below which growth does not take 



place. 

 MYCELIOID, colonies having the radiately filamentous appearance of mold 



colonies. 

 NAPIFORM, liquefaction with the form of a turnip. 



NITROGEN REQUIREMENTS, the necessary nitrogenous food. This is 

 determined by adding to nitrogen-free media the nitrogen compound to be 

 tested. 

 OPALESCENT, resembling the color of an opal. 



OPTIMUM TEMPERATURE, temperature at which growth is most rapid. 

 PELLICLE, in fluid bacterial growth either forming a continuous or an inter- 

 rupted sheet over the fluid. 

 PEPTONIZED, said of curds dissolved by trypsin. 

 PERSISTENT, many weeks, or months. 

 PLUMOSE, a fleecy or feathery growth. 



PSEUDOZOOGLOEAE, clumps of bacteria, not dissolving readily in water, 

 arising from imperfect separation, or more or less fusion of the components, 

 but not having the degree of compactness and gelatinization seen in 

 zoogloeae. 

 PULVINATE, in the form of a cushion, decidedly convex. 

 PUNCTIFORM, very minute colonies, at the limit of natural vision.. 



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