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.

Quartine :: Quartine (n.) A supposed fourth integument of an ovule, counting from the outside..

Ovulum :: Ovulum (n.) An ovule.

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

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

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

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

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

Gemmule :: Gemmule (n.) An ovule.

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

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

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

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

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

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..

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..

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..

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

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