dicotyledonWiktionary 原文构词拆分di-前缀“two”Two. · Double, twice the quantity.+cotyledon词根/词干“embryonic leaf”词源说明From di- (“two”) + cotyledon (“embryonic leaf”).释义（英文）名词 Noun(botany) A plant whose seedling has two cotyledons.(botany, historical) Any plant in what used to be the Dicotyledones.词族派生词（3）antidicotyledondicotyledonousPalaeodicotyledons