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

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

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

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

Pendulous :: Pendulous (a.) Inclined or hanging downwards, as a flower on a recurved stalk, or an ovule which hangs from the upper part of the ovary..

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..

Ovular :: Ovular (a.) Relating or belonging to an ovule; as, an ovular growth..

Anatropous :: Anatropous (a.) Having the ovule inverted at an early period in its development, so that the chalaza is as the apparent apex; -- opposed to orthotropous..

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

Oospore :: Oospore (n.) A fertilized oosphere in the ovule of a flowering plant.

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

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..

Ovuliferous :: Ovuliferous (a.) Producing ovules.

Gemmule :: Gemmule (n.) An 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..

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

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

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

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.

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..