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Cotyledon   Listen
noun
Cotyledon  n.  
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. 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.





Collaborative International Dictionary of English 0.48


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"Cotyledon" Quotes from Famous Books



... plants produced from the two embryos were "extremely different in appearance and character," though both resembled other hybrids of the same parentage produced at the same time. These twin plants "were closely coherent, below the two pairs of cotyledon-leaves, into a single cylindrical stem, so that they had subsequently the appearance of being branches on one trunk." Had the two united stems grown up to their full height, instead of dying, a curiously mixed hybrid would have been produced; but even if ...
— The Variation of Animals and Plants Under Domestication, Vol. I. • Charles Darwin
... Cotyledon Chrysantha (Umbilicus).—A choice Alpine succulent which thrives in a sandy loam, or in well-drained pots of the same soil. It flowers from May to August, and is multiplied by cuttings, which must be left to dry for a few ...
— Gardening for the Million • Alfred Pink


Words linked to "Cotyledon" :   Lewisia cotyledon


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