megasporeWiktionary 原文英美构词拆解megamega-前缀sporespore词干mega-(originally) Very large, great. · In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by one million (106).词源说明From mega- + spore.释义名词noun1(botany) The larger spore of a heterosporous plant, typically producing a female gametophyte同族词派生词 4coenomegaspore·megasporogenesis·megasporic·