germ membrane (jermmembran)

A germ layer. germ on (jer'mon), n. [ germ-plasma (jerm plazma), nd Protoplasm a germ or ovum, and supposed influence or determine the character of the resulting organism, by virtue of its special chemical or molecular composition. Germ-plasma may thus be considered, theoretically, as the physical basis of all the phenomena which are grouped under the name of heredity. The germ - plasma is regarded as a substance of peculiar chemical or even more special molecular composition, which pa es over from one generation to another. Jour . Roy . Micros . Soc ., 1886, p. 213. germ-pore (jerm'põr), n . In cryptogamic bot . , a pore or pit in the outer integument of a spore, through which the exit of the germ-tube takes place. Many of these pores serve as places of exit for the tubular outgrowths from the spore at the time of germination, and may therefore be termed germ - pores; others perform no such function, and are therefore only simple pores or De Bary, Fungi (trans.), p. 100. pits. germ-shield (jerm'shēld), n. Same as not aspis. The germ - shield is merely the earliest rudiment of that dorsal part which first becomes defined. Haeckel, Evol. of Man (trans.), I. 298. germ-stock (jerm's tok), n. Same as stolo proli fer (which see, under stolo ).