a structure within which a plant embryo develops; spec. (in an angiosperm) a thin-walled sac inside the nucellus of the ovule within which…
| 单词 | θ22098 |
| 释义 | the world > plants > part of plant > reproductive part(s) > seed > [noun] > parts of > embryo-sac (5) embryo sac1837 a structure within which a plant embryo develops; spec. (in an angiosperm) a thin-walled sac inside the nucellus of the ovule within which… macrospore1855 Botany and Mycology. The larger of the two types of spore produced by a heterosporous plant (now usually called megaspore); (also) the larger of… megaspore1857 The larger of the two kinds of spores produced by heterosporous cryptogams, which develops into the female gametophyte. Also: the analogous… Subcategories:— cell of (2) |
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