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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Rhaphe :: Rhaphe (n.) The continuation of the seed stalk along the side of an anatropous ovule or seed, forming a ridge or seam..

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.

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..

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

Exostome :: Exostome (n.) The small aperture or foremen in the outer coat of the ovule of a plant.

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

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

Seed :: Seed (n.) A ripened ovule, consisting of an embryo with one or more integuments, or coverings; as, an apple seed; a currant seed. By germination it produces a new plant..

Monembryony :: Monembryony (n.) The condition of an ovule having but a single embryo.

Ovule :: 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..

Spore :: Spore (n.) An embryo sac or embryonal vesicle in the ovules of flowering plants.

Secundine :: Secundine (n.) The second coat, or integument, of an ovule, lying within the primine..

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

Amphitropous :: Amphitropous (a.) Having the ovule inverted, but with the attachment near the middle of one side; half anatropous..

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

Impregnable :: Impregnable (a.) Capable of being impregnated, as the egg of an animal, or the ovule of a plant..

Gemmule :: Gemmule (n.) An ovule.

Campylotropous :: Campylotropous (a.) Having the ovules and seeds so curved, or bent down upon themselves, that the ends of the embryo are brought close together..

Nucleus :: Nucleus (n.) An incipient ovule of soft cellular tissue.

Primine :: Primine (n.) The outermost of the two integuments of an ovule.