82 
Fluorescent, having one color by transmitted light and another by re¬ 
flected light. 
Gram’s stain, a method of differential bleaching after crystal violet, 
methyl violet, etc. The+mark is to be given only when the bacteria are deep 
blue or remain blue after counterstaining with a counterstain 
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, several weeks. 
Membranous, growth thin, coherent, like membrane. 
Minimum temperature, temperature below which growth does not take 
place. 
Myceloid, colonies having the radiately filamentous’appearance of mold 
colonies. 
Napiform, liquefaction with the form of a turnip. 
Nitrogen requirments, the necessary nitrogenous food. This is deter¬ 
mined 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 in¬ 
terrupted 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 separating 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 zoolgoeae. 
Pulvinate, in the form of a cushion, decidely convex. 
Punctiform, very minute colonies, at the limit of natural vision. 
Raised, growth thick, with abrupt or terraced edges. 
Rapid, developing in twenty-four to forty-eight hours. 
Repand, wrinkled. 
Rhizoid, growth of an irregular branched, or root-like character, as in 
B. mycoides. 
Ring, (same as rim), growth at the upper margin of a liquid culture, ad¬ 
hering more or less closely to the glass. 
Saccate, liquefaction the shape of an elongated sack, tubular, cylindrical. 
Scum, floating islands of bacteria, an interrupted pellicle or, bacterial 
membrane. 
Short, applied to time, a few days, a week. 
Slow, requiring five or six days or more for development. 
Sporangia, cells containing endospores. 
Spreading, growth extending much beyond the line of inoculation; that is, 
several millimeters or more. 
