English definition of Ovule

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Definition of ovule

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Ovule (n.) The rudiment of a seed. It grows from a placenta, and consists of a soft nucleus within two delicate coatings. The attached base of the ovule is the hilum, the coatings are united with the nucleus at the chalaza, and their minute orifice is the foramen..

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Ovuliferous :: Ovuliferous (a.) Producing ovules.

Podosperm :: Podosperm (n.) The stalk of a seed or ovule.

Ovulate :: Ovulate (a.) Containing an ovule or ovules.

Pistil :: Pistil (n.) The seed-bearing organ of a flower. It consists of an ovary, containing the ovules or rudimentary seeds, and a stigma, which is commonly raised on an elongated portion called a style. When composed of one carpel a pistil is simple; when composed of several, it is compound. See Illust. of Flower, and Ovary..

Hilum :: Hilum (n.) The eye of a bean or other seed; the mark or scar at the point of attachment of an ovule or seed to its base or support; -- called also hile.

Uniovulate :: Uniovulate (a.) Containing but one ovule.

Oospere :: Oospere (n.) An analogous mass of protoplasm in the ovule of a flowering plant; an embryonic vesicle.

Ovulary :: Ovulary (a.) Pertaining to ovules.

Apogamy :: Apogamy (n.) The formation of a bud in place of a fertilized ovule or oospore.

Placenta :: Placenta (n.) The part of a pistil or fruit to which the ovules or seeds are attached.

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

Micropyle :: Micropyle (n.) An opening in the outer coat of a seed, through which the fecundating pollen enters the ovule..

Hemitropous :: Hemitropous (a.) Having the raphe terminating about half way between the chalaza and the orifice; amphitropous; -- said of an ovule.

Prunus :: Prunus (n.) A genus of trees with perigynous rosaceous flowers, and a single two-ovuled carpel which usually becomes a drupe in ripening..

Heterotropous :: Heterotropous (a.) Having the embryo or ovule oblique or transverse to the funiculus; amphitropous.

Gymnogen :: Gymnogen (n.) One of a class of plants, so called by Lindley, because the ovules are fertilized by direct contact of the pollen. Same as Gymnosperm..

Spermaphore :: Spermaphore (n.) That part of the ovary from which the ovules arise; the placenta.

Endostome :: Endostome (n.) The foramen or passage through the inner integument of an ovule.

Quintine :: Quintine (n.) The embryonic sac of an ovule, sometimes regarded as an innermost fifth integument. Cf. Quartine, and Tercine..

Orthotropous :: Orthotropous (a.) Having the axis of an ovule or seed straight from the hilum and chalaza to the orifice or the micropyle; atropous.