AMEBOID, assuming various shapes like an ameba. AMORPHOUS, without visible differentiation in structure. ARBORESCENT, a branched, tree-like growth. BEADED, in stab or stroke, disjointed or semiconfluent colonies along the lines of inoculation. BRIEF, a few days, a week. BRITTLE, growth dry, friable under the platinum needle. BULLATE, growth rising in convex prominences, like a blistered surface. BUTYROUS, growth of a butter-like consistency. CHAINS, Short chains, composed of 2 to 8 elements. Long chains, composed of more than 8 elements. CILIATE, having fine, hair-like extensions, like cilia. CLOUDY, said of fluid cultures which do not contain pseudozoogleæ. COAGULATION,[22] the separation of casein from whey in milk. This may take place quickly or slowly, and as the result either of the formation of an acid or of a lab ferment. CONTOURED, an irregular, smoothly undulating surface, like that of a relief map. CONVEX surface, the segment of a circle, but flattened. COPROPHYL, dung bacteria. CORIACEOUS, growth tough, leathery, not yielding to the platinum needle. CRATERIFORM, round, depressed, due to the liquefaction of the medium. CRETACEOUS, growth opaque and white, chalky. CURLED, composed of parallel chains in wavy strands, as in anthrax colonies. DIASTASIC ACTION, same as DIASTATIC, 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 filaments. 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 pseudozoogleæ, _i.e._, small adherent 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 counter-staining with Bismarck 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, nutrient substance upon which bacteria are grown. MEMBRANOUS, growth thin, coherent, like a membrane.