First Known Use: 1540
Dictionary
cotyledon
noun cot·y·le·don \ˌkä-tə-ˈlē-dən\
Definition of COTYLEDON
1
: a lobule of the mammalian placenta
2
: the first leaf or one of the first pair or whorl of leaves developed by the embryo of a seed plant or of some lower plants (as ferns)
— cot·y·le·don·ary \-ˈlē-də-ˌner-ē\ adjective
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Origin of COTYLEDON
New Latin, from Greek kotylēdōn cup-shaped hollow, from kotylē cup, anything hollow
Medical Dictionary
cotyledon
noun cot·y·le·don \ˌkät-əl-ˈēd-ən\
Medical Definition of COTYLEDON
1
: a lobule of a mammalian placenta
2
: the first leaf or one of the first pair or whorl of leaves developed by the embryo of a seed plant or of some lower plants (as ferns)
—cot·y·le·don·ary \-ˈēd-ən-ˌer-ē\ adjective
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