Ger"mi*nal (?), a. [See Germ.]
Pertaining or belonging to a germ; as, the germinal
vesicle.
Germinal layers (Biol.), the two
layers of cells, the ectoblast and entoblast, which form respectively
the outer covering and inner wall of the gastrula. A third layer of
cells, the mesoblast, which is formed later and lies between these
two, is sometimes included. -- Germinal
membrane. (Biol.) Same as
Blastoderm. -- Germinal spot
(Biol.), the nucleolus of the ovum. --
Germinal vesicle, (Biol.) , the nucleus
of the ovum of animals.
||Ger`mi*nal" (?), n. [F. See
Germ .] The seventh month of the French republican
calendar [1792 -- 1806]. It began March 21 and ended April 19. See
VendÉmiaire.
Ger"mi*nal, a. (Biol.) Of or
pertaining to the germ, or germ cells, as distinguished from the
somatic cells.