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

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

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

Ovule :: Ovule (n.) An ovum.

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

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

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..

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

Ovuliferous :: Ovuliferous (a.) Producing ovules.

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

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..

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

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

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..

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

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

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

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

Quintine :: Quintine (n.) The embryonic sac of an ovule, sometimes regarded as an innermost fifth integument. Cf. Quartine, and Tercine..