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Webster 1913 Edition


Cotyledon

Cotˊy-le′don

(k?tˊ?-l?′d?n)
,
Noun.
[Gr.[GREEK][GREEK][GREEK] a cupshaped hollow, fr. [GREEK][GREEK][GREEK]. See
Cotyle
.]
1.
(Anat.)
One of the patches of villi found in some forms of placenta.
2.
(Bot.)
A leaf borne by the caulicle or radicle of an embryo; a seed leaf.
☞ 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.

Webster 1828 Edition


Cotyledon

COTYLEDON

,
Noun.
[Gr., a hollow or cavity.]
1.
In botany, the perishable lobe or placenta of the seeds of plants. It involves and nourishes the embryo plant, and then perishes. Some seeds have two lobes; others one only, and others none.
2.
In anatomy, a little glandular body adhering to the chorion of some animals.
3.
A genus of plants, navel-wort, or kidney-wort, of several species.

Definition 2022


cotyledon

cotyledon

See also: cotylédon

English

Noun

cotyledon (plural cotyledons)

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

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