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A more or less spherical and transparent mass of granular protoplasm, which by a process of multiplication and growth develops into a mass of cells, constituting a new individual like the parent; an egg, spore, germ, or germ cell. See Illust. of Mycropyle.

A game at dice, properly called novem quinque (L., nine five), the two principal throws being nine and five. [Obs.] Shak.

An egglike germ produced by the agamic females of some insects and other animals, and by the larvæ of certain insects. It is capable of development without fertilization. See Illust. of Pædogenesis.

An embryonic insect which has twice cast its skin previous to hatching from the egg.

A small, clear space in the segments of the ovum, the precursor of the nucleus.

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

One of the segments first formed by the division of the ovum. Balfour.

or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum.

That stage in the development of the ovum in which the outer cells of the morula become more defined and form the blastoderm.

Having the food yolk placed at the center of the ovum, segmentation being either regular or unequal. Balfour.

n of laminæ or layers; one of the methods by which the various blastodermic layers of the ovum are differentiated.

The lifeless food matter in the cytoplasm of an ovum or a cell, as distinguished from the active or true protoplasm; yolk substance; yolk.

dividual and the male flowers on another of the same species, and to animals in which the ovum is produced by one individual and the sperm cell by another; -- opposed to monoecious.

Characterizing the ovum when it has two primary germinal layers.

as, the "ectental line" or line of juncture of the two layers in the segmentation of the ovum. C. S. Minot.

The outer transparent layer of protoplasm in a developing ovum.

A simple cell, from the development of which the young of animals are formed; ovum; germ cell.

evelopment of the embryo in animals and plants; a study of the gradual development of the ovum until it reaches the adult stage.

The inner granular layer of protoplasm in a developing ovum.

To render fruitful or prolific; to impregnate; as, in flowers the pollen fecundates the ovum through the stigma.