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Hectocotylus :: Hectocotylus (n.) One of the arms of the male of most kinds of cephalopods, which is specially modified in various ways to effect the fertilization of the eggs. In a special sense, the greatly modified arm of Argonauta and allied genera, which, after receiving the spermatophores, becomes detached from the male, and attaches itself to the female for reproductive purposes..

Female :: Female (n.) A plant which produces only that kind of reproductive organs which are capable of developing into fruit after impregnation or fertilization; a pistillate plant.

Geitonogamy :: Geitonogamy (n.) Fertilization of flowers by pollen from other flowers on the same plant.

Parthenogenesis :: Parthenogenesis (n.) The production of new individuals from virgin females by means of ova which have the power of developing without the intervention of the male element; the production, without fertilization, of cells capable of germination. It is one of the phenomena of alternate generation. Cf. Heterogamy, and Metagenesis..

Self-fertilization :: Self-fertilization (n.) The fertilization of a flower by pollen from the same flower and without outer aid; autogamy.

Orthogamy :: Orthogamy (n.) Direct fertilization in plants, as when the pollen fertilizing the ovules comes from the stamens of the same blossom; -- opposed to heterogamy..

Fertilization :: Fertilization (n.) The act of fecundating or impregnating animal or vegetable germs; esp., the process by which in flowers the pollen renders the ovule fertile, or an analogous process in flowerless plants; fecundation; impregnation..

Polyembryony :: Polyembryony (n.) The production of two or more embryos in one seed, due either to the existence and fertilization of more than one embryonic sac or to the origination of embryos outside of the embryonic sac..

Cleistogamous :: Cleistogamous (a.) Having, beside the usual flowers, other minute, closed flowers, without petals or with minute petals; -- said of certain species of plants which possess flowers of two or more kinds, the closed ones being so constituted as to insure self-fertilization..

Fertilization :: Fertilization (n.) The act or process of rendering fertile.

Male :: Male (v. t.) Capable of producing fertilization, but not of bearing fruit; -- said of stamens and antheridia, and of the plants, or parts of plants, which bear them..

Carpophyte :: Carpophyte (n.) A flowerless plant which forms a true fruit as the result of fertilization, as the red seaweeds, the Ascomycetes, etc..

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..

Proembryo :: Proembryo (n.) The series of cells formed in the ovule of a flowering plant after fertilization, but before the formation of the embryo..

Xenogamy :: Xenogamy (n.) Cross fertilization.

Female :: Female (a.) Having pistils and no stamens; pistillate; or, in cryptogamous plants, capable of receiving fertilization..

Heterogamy :: Heterogamy (n.) The process of fertilization in plants by an indirect or circuitous method; -- opposed to orthogamy.

Spermatozoid :: Spermatozoid (n.) The male germ cell in animals and plants, the essential element in fertilization; a microscopic animalcule-like particle, usually provided with one or more cilia by which it is capable of active motion. In animals, the familiar type is that of a small, more or less ovoid head, with a delicate threadlike cilium, or tail. Called also spermatozoon. In plants the more usual term is antherozoid..

Oospore :: Oospore (n.) A special kind of spore resulting from the fertilization of an oosphere by antherozoids.

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..

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