cotyledon

noun
cot·​y·​le·​don | \ ˌkä-tə-ˈlē-dᵊn How to pronounce cotyledon (audio) \

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 (such as ferns) — see seedling illustration

Other Words from cotyledon

cotyledonary \ ˌkä-​tə-​ˈlē-​də-​ˌner-​ē How to pronounce cotyledonary (audio) \ adjective

First Known Use of cotyledon

1540, in the meaning defined at sense 1

History and Etymology for cotyledon

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

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The first known use of cotyledon was in 1540

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Cite this Entry

“Cotyledon.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/cotyledon. Accessed 21 January 2020.

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More Definitions for cotyledon

cotyledon

noun
cot·​y·​le·​don | \ ˌkät-ᵊl-ˈēd-ᵊn How to pronounce cotyledon (audio) \

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)

Other Words from cotyledon

cotyledonary \ -​ˈēd-​ᵊn-​ˌer-​ē How to pronounce cotyledonary (audio) \ adjective

More from Merriam-Webster on cotyledon

Britannica.com: Encyclopedia article about cotyledon

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