cotyledon.
Each of the patches of villi on the foetal chorion in the placenta of ruminants and some other mammals.
Meaning & usage
Each of the patches of villi on the foetal chorion in the placenta of ruminants and some other mammals.
The leaf of the embryo of a seed-bearing plant; after germination it becomes the first leaves of the seedling.
Where this word comes from
From Latin cotylēdōn, from Ancient Greek κοτυληδών (kotulēdṓn, “cup-shaped cavity”), from κοτύλη (kotúlē, “cup”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.