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

Origin of COTYLEDON

New Latin, from Greek kotylēdōn cup-shaped hollow, from kotylē cup, anything hollow
First Known Use: 1540

cotyledon

noun cot·y·le·don \ˌkät-əl-ˈēd-ən\   (Medical Dictionary)

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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