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Ovule :: Ovule (n.) An ovum.

Triploblastic :: Triploblastic (a.) Of, pertaining to, or designating, that condition of the ovum in which there are three primary germinal layers, or in which the blastoderm splits into three layers..

Centrolecithal :: Centrolecithal (a.) Having the food yolk placed at the center of the ovum, segmentation being either regular or unequal..

Ectental :: Ectental (a.) Relating to, or connected with, the two primitive germ layers, the ectoderm and ectoderm; as, the ectental line or line of juncture of the two layers in the segmentation of the ovum..

Pronucleus :: Pronucleus (n.) One of the two bodies or nuclei (called male and female pronuclei) which unite to form the first segmentation nucleus of an impregnated ovum.

Egg :: Egg (n.) A simple cell, from the development of which the young of animals are formed; ovum; germ cell..

Blastide :: Blastide (n.) A small, clear space in the segments of the ovum, the precursor of the nucleus..

Blastosphere :: Blastosphere (n.) The hollow globe or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum.

Metagenesis :: Metagenesis (n.) The change of form which one animal species undergoes in a series of successively produced individuals, extending from the one developed from the ovum to the final perfected individual. Hence, metagenesis involves the production of sexual individuals by nonsexual means, either directly or through intervening sexless generations. Opposed to monogenesis. See Alternate generation, under Generation..

Morulation :: Morulation (n.) The process of cleavage, or segmentation, of the ovum, by which a morula is formed..

Ovisac :: Ovisac (n.) A Graafian follicle; any sac containing an ovum or ova.

Diploblastic :: Diploblastic (a.) Characterizing the ovum when it has two primary germinal layers.

Prefecundation :: Prefecundation (n.) A term collectively applied to the changes or conditions preceding fecundation, especially to the changes which the ovum undergoes before fecundation..

Impregnate :: Impregnate (v. t.) To come into contact with (an ovum or egg) so as to cause impregnation; to fertilize; to fecundate.

Ovum :: Ovum (n.) One of the series of egg-shaped ornaments into which the ovolo is often carved.

Pseudovum :: Pseudovum (n.) An egglike germ produced by the agamic females of some insects and other animals, and by the larvae of certain insects. It is capable of development without fertilization. See Illust. of Paedogenesis..

Tritovum :: Tritovum (n.) An embryonic insect which has twice cast its skin previous to hatching from the egg.

Ova :: Ova (n. pl.) See Ovum.

Ovums :: Ovums (pl. ) of Ovu.

Ectoplasm :: Ectoplasm (n.) The outer transparent layer of protoplasm in a developing ovum.

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