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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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.

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

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

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

Gemmule :: Gemmule (n.) An 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..

Amphitropous :: Amphitropous (a.) Having the ovule inverted, but with the attachment near the middle of one side; half anatropous..

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..

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

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

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

Ovule :: Ovule (n.) An ovum.

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..

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

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

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

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

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

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