cot·y·le·don

noun

/ˌkɒtɪˈliːdn/

/ˌkɑːtɪˈliːdn/

(specialist)

a part inside a seed that looks like a small leaf, which the developing plant uses as a store of food. Cotyledons are the first parts of the seed to appear above the ground when it begins to grow.种子内部看起来像小叶子的部分，发育中的植物用它来储存食物。子叶是种子开始生长时第一个露出地面的部分。Topics Plants and treesc2
Word Originmid 16th cent. (denoting a patch of villi on the placenta of mammals): from Latin, ‘navelwort’ (which has cup-shaped leaves), from Greek kotulēdōn ‘cup-shaped cavity’, from kotulē ‘cup’.

单词	cotyledon
释义	cot·y·le·don noun /ˌkɒtɪˈliːdn/ /ˌkɑːtɪˈliːdn/ (specialist) a part inside a seed that looks like a small leaf, which the developing plant uses as a store of food. Cotyledons are the first parts of the seed to appear above the ground when it begins to grow.种子内部看起来像小叶子的部分，发育中的植物用它来储存食物。子叶是种子开始生长时第一个露出地面的部分。Topics Plants and treesc2 Word Originmid 16th cent. (denoting a patch of villi on the placenta of mammals): from Latin, ‘navelwort’ (which has cup-shaped leaves), from Greek kotulēdōn ‘cup-shaped cavity’, from kotulē ‘cup’.
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