{ } n. [ Gr. &unr_;&unr_;&unr_; anything hollow, cup of a joint, small meassure: cf. L. cotyla a measure. ] (Anat.) A cuplike cavity or organ. Same as Acetabulum. [ 1913 Webster ]
n. [ Gr.&unr_;&unr_;&unr_; a cupshaped hollow, fr. &unr_;&unr_;&unr_;. See Cotyle. ] 1. (Anat.) One of the patches of villi found in some forms of placenta. [ 1913 Webster ]
2. (Bot.) A leaf borne by the caulicle or radicle of an embryo; a seed leaf. [ 1913 Webster ]
☞ 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. [ 1913 Webster ]
a. [ Cotyle + -oid ] (Anat.) (a) Shaped like a cup; cup-shaped; as, the cotyloid cavity, the cup-shaped socket which receives the head of the thigh bone. (b) Pertaining to a cotyloid cavity; as, the cotyloid ligament, or notch. Syn. -- acetabular, cotyloid. [ 1913 Webster + WordNet 1.5 ]
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