Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of ovum is as below...

Dioecious :: Dioecious (a.) Having the sexes in two separate individuals; -- applied to plants in which the female flowers occur on one individual 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..

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..

Perivitelline :: Perivitelline (a.) Situated around the vitellus, or between the vitellus and zona pellucida of an ovum..

Entoplasm :: Entoplasm (n.) The inner granular layer of protoplasm in a developing ovum.

Impregnation :: Impregnation (n.) The fusion of a female germ cell (ovum) with a male germ cell (in animals, a spermatozoon) to form a single new cell endowed with the power of developing into a new individual; fertilization; fecundation..

Segment :: Segment (v. i.) To divide or separate into parts in growth; to undergo segmentation, or cleavage, as in the segmentation of the ovum..

Blastula :: Blastula (n.) That stage in the development of the ovum in which the outer cells of the morula become more defined and form the blastoderm.

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

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..

Oosperm :: Oosperm (n.) The ovum, after fusion with the spermatozoon in impregnation..

Organum :: Organum (n.) An organ or instrument; hence, a method by which philosophical or scientific investigation may be conducted; -- a term adopted from the Aristotelian writers by Lord Bacon, as the title (Novum Organon) of part of his treatise on philosophical method..

Morula :: Morula (n.) The sphere or globular mass of cells (blastomeres), formed by the clevage of the ovum or egg in the first stages of its development; -- called also mulberry mass, segmentation sphere, and blastosphere. See Segmentation..

Blastoderm :: Blastoderm (n.) The germinal membrane in an ovum, from which the embryo is developed..

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

Ovule :: Ovule (n.) An ovum.

Vitellus :: Vitellus (n.) The contents or substance of the ovum; egg yolk. See Illust. of Ovum.

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

Micromere :: Micromere (n.) One of the smaller cells, or blastomeres, resulting from the complete segmentation of a telolecithal ovum..

Invagination :: Invagination (n.) One of the methods by which the various germinal layers of the ovum are differentiated.

Blastomere :: Blastomere (n.) One of the segments first formed by the division of the ovum.

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