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单词 cotyledon
释义

cotyledon

noun

cot·​y·​le·​don ˌkä-tə-ˈlē-dᵊn How to pronounce cotyledon (audio)
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 (such as ferns) see seedling illustration
cotyledonary
ˌkä-tə-ˈlē-də-ˌner-ē How to pronounce cotyledon (audio)
adjective

Word History

Etymology

New Latin, from Greek kotylēdōn cup-shaped hollow, from kotylē cup, anything hollow

First Known Use

1540, in the meaning defined at sense 1

Kids Definition

cotyledon

noun

cot·​y·​le·​don ˌkä-tə-ˈlē-dᵊn How to pronounce cotyledon (audio)
: the first leaf or one of the first leaves of a plant which is usually folded within a seed until germination and which serves as a storehouse of food for the plant

Medical Definition

cotyledon

noun

cot·​y·​le·​don ˌkät-ᵊl-ˈēd-ᵊn How to pronounce cotyledon (audio)
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)
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更新时间:2025/3/16 13:00:18