| 单词 | cotyledon |
| 释义 | cotyledon n. 1. an embryonic leaf in seed-bearing plants. 2. any succulent plant of the genus Umbilicus, e.g. pennywort. Derivatives cotyledonary adj. cotyledonous adj. Etymology: L, = pennywort, f. Gk kotuledon cup-shaped cavity f. kotule cup |
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