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The Collaborative International Dictionary of English v.0.48 (gcide)

Endogen \En"do*gen\, n. [Endo- -gen: cf. F. endog[`e]ne.]
(Bot.)
A plant which increases in size by internal growth and
elongation at the summit, having the wood in the form of
bundles or threads, irregularly distributed throughout the
whole diameter, not forming annual layers, and with no
distinct pith. The leaves of the endogens have, usually,
parallel veins, their flowers are mostly in three, or some
multiple of three, parts, and their embryos have but a single
cotyledon, with the first leaves alternate. The endogens
constitute one of the great primary classes of plants, and
included all palms, true lilies, grasses, rushes, orchids,
the banana, pineapple, etc. See {Exogen}.
[1913 Webster]

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