142 CONN, HARDING, KLIGLER, FROST, PRUCHA AND ATKINS 



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



Diastatic action, conversion of starch into simpler carbohydrates, such as dex- 

 trins or sugars, by means of diastase. 



Echinulate, a growth along line of inoculation with toothed or pointed margins. 



Effuse, growth thin, veily, unusually spreading. 



Endospores, thick-walled spores formed within the bacterial cell; i.e., typical 

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



Entire, with an even margin. 



Erose, border irregularly toothed. 



Filaments, applied to morphology of bacteria, refers to thread-like forms, gen- 

 erally unsegmented; if segmented, to be distinguished from chains (q.v.) 

 by the absence of constrictions between the segments. 



Filamentous, growth composed of long, irregularly placed or interwoven threads. 



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



Flocculent, containing small adherent masses of bacteria of various shapes float- 

 ing in the culture fluid. 



Fluorescent, having one color by transmitted light and another by reflected light. 



Granular, composed of small granules. 



Infundibuliform, form of a funnel or inverted cone. 



Iridescent, exhibiting changing rainbow colors in reflected light. 



Lobate, having the margin deeply undulate, producing lobes (see undulate). 



Luminous, glowing in the dark, phosphorescent. 



Maximum temperature, temperature above which growth does not take place. 



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 in form of a turnip. 



Opalescent, resembling the color of an opal. 



Optimum temperature, temperature at which growth is most rapid. 



Papillate, growth beset with small nipple-like processes. 



Pellicle, bacterial growth forming either a continuous or an interrupted sheet 

 over the culture fluid. 



Peptonization, rendering curdled milk soluble by the action of peptonizing 

 enzymes. 



Peritrichiate, covered with flagella over the entire surface. 



Persistent, lasting many weeks or months. 



Plumose, a fleecy or feathery growth. 



Polar, at the end or pole of the bacterial cell. 



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



Punctiform, very small, but visible to naked eye; under 1 mm. in diameter. 



Radiate, showing ray-structure. 



Raised, growth thick, with abrupt or terraced edges. 



Reduction, removing oxygen from a chemical compound. Refers to the con- 

 version of nitrate to nitrite, ammonia, or free nitrogen, and to the decol- 

 orization of litmus. 



Rhizoid, growth of an irregular branched or root-like character, as in B. mycoides. 



Ring, growth at the upper margin of a liquid culture, adhering to the glass. 



Rapid, developing in twenty-four to forty-eight hours. 



