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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 inc…

Non-germinal.

A name suggested by Dr. Beale for the germinal matter supposed to be essential to the functions of all living beings; the material through which every form of life manifests itself; unaltered protoplasm.

The germinal vesicle.

The germinal membrane in an ovum, from which the embryo is developed.

The nucleus of a cell; the germinal or active spot of a cellule, through or in which cell development takes place.

Characterizing the ovum when it has two primary germinal layers.

a circular structure either in plants or animals; as, a blood disc, a germinal disc, etc. Same as Disk.

A circular structure either in plants or animals; as, a blood disk; germinal disk, etc.

Capable of growth and development; germinal; as, living or formative matter.

eless matter of a cell, that which is physiologically dead, in distinction from the truly germinal or living matter.

n; having power to bud or develop. Germinative spot, Germinative vesicle. (Biol.) Same as Germinal spot, Germinal vesicle, under Germinal.

an ovum composed entirely of germinal matter. See Meroblast.

Undergoing complete segmentation; composed entirely of germinal matter, the whole of the yolk undergoing fission; -- opposed to meroblastic.

Homology of the germinal layers.

One of the methods by which the various germinal layers of the ovum are differentiated.

An ovum, as that of a mammal, only partially composed of germinal matter, that is, consisting of both a germinal portion and an albuminous or nutritive one; -- opposed to holoblast.

Consisting only in part of germinal matter; characterized by partial segmentation only; as, meroblastic ova, in which a portion of the yolk only undergoes fission; meroblastic segmentation; -- opposed to holoblastic.

sp. applied to a body formed in the developing ovum from the plasma of the nucleus of the germinal vesicle.

A germinal vesicle.