106 PHARMACEUTICAL BACTERIOLOGY 



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 a membrane. 



Minimum Temperature, temperature below which growth does not take place. 



Mycelioid, colonies having the radiately filamentous appearance of mould 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 interrupted sheet 

 over the fluid. 



Peptonized, said of curds dissolved by trypsin. 



Persistent, many weeks, or months. 



Pseudozooglea, clumps of bacteria, not dissolving readily in water, arising from imper- 

 fect separation, or more or less fusion of the components, but not having the degree 

 of compactness and gelatinization seen in zooglea. 



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



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



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



Raised, growth thick, with abrupt or terraced edges. 



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, adhering more or less 

 closely to the glass. 



Saccate, liquefaction the shape of an elongated sac, tubular, cylindrical. 



Scum, floating islands of bacteria, an interrupted pellicle or bacterial membrane. 



Slow, requiring five or six days or more for development. 



Short, applied to time, a few days, a week. 



Sporangia, cells containing endospores. 



Spreading, growth extending much beyond the line of inoculation, i.e., several milli- 

 meters or more. 



Stratiform, liquefying to the walls of the tube at the top and then proceeding downward 

 horizontally. 



Thermal Death-point, the degree of heat required to kill young fluid cultures of an organ- 

 ism exposed for ten minutes (in thin-walled test-tubes of a diameter not exceeding 

 20 mm.) in the thermal water-bath. The water must be kept agitated so that 

 the temperature shall be uniform during the exposure. 



Transient, a few days. 



Turbid, cloudy with flocculent particles; cloudy flocculence. 



Umbonate, having a button-like, raised center. 



Undulate, border wavy with shallow sinuses. 



Verrucose, growth wart-like, with wart-like prominences. 



Vermiform-contoured, growth like a mass of worms, or intestinal coils. 



Villons, growth beset with hair-like extensions. 



