| 单词 | macrospore |
| 释义 | macrospore (once / 262652 pages) n WORD FAMILY macrospore: macrospores USAGE EXAMPLESThe macrospores are in the shape of a low triangular pyramid with a hemispherical base, and marked with elevated ribs along the angles. Gray, Asa, The Manual of the Botany of the Nor...(2012) Section of a spore-case containing macrospores, equally magnified; at the right three macrospores more magnified. Gray, Asa, The Elements of Botany—For Beginner...(2010) L, young plant, with the attached macrospore, × 6. r, the first root. l, the first leaves. Campbell, Douglas Houghton, Elements of Structural and Systemat...(2010) n larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte Syn|Hyper megaspore spore a small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion |
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