COTYLEDON

cotyledon, seed leaf

(noun) embryonic leaf in seed-bearing plants

Source: WordNet® 3.1

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Etymology

Noun

cotyledon (plural cotyledons)

(physiology) Each of the patches of vili on the foetal chorion of ruminants and some other mammals.

(botany) The leaf of the embryo of a seed-bearing plant; after germination it becomes the first leaves of the seedling.

Synonyms

• seed leaf

Source: Wiktionary

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Cot`y*le"don (kt`-l"dn), n. Etym: [Gr.Cotyle.]

1. (Anat.)

Definition: One of the patches of villi found in some forms of placenta.

2. (Bot.)

Definition: A leaf borne by the caulicle or radicle of an embryo; a seed leaf.

Note: Many plants, as the bean and the maple, have two cotyledons, the grasses only one, and pines have several. In one African plant (Welwitschia) the cotyledons are permanent and grow to immense proportions.

Source: Webster’s Unabridged Dictionary 1913 Edition

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