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.

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

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

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..

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..

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.

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

Ovulum :: Ovulum (n.) An ovule.

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

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

Gemmule :: Gemmule (n.) An ovule.

Abortive :: Abortive (v.) Imperfectly formed or developed; rudimentary; sterile; as, an abortive organ, stamen, ovule, etc..

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

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..

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

Tercine :: Tercine (n.) A cellular layer derived from the nucleus of an ovule and surrounding the embryo sac. Cf. Quintine.

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

Chalaza :: Chalaza (n.) The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus..