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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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..

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

Gemmule :: Gemmule (n.) An ovule.

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

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..

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.

Ovuliferous :: Ovuliferous (a.) Producing ovules.

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

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

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

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

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

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..

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

Ovule :: Ovule (n.) An ovum.

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..

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..

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.

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