单词 | midvein |
释义 | > as lemmasmidvein midvein n. the central vein of a leaf. ΚΠ 1857 T. Moore Handbk. Brit. Ferns (ed. 3) 168 Venation (pinnules) consisting of a flexuous midvein. 1877 F. G. Heath Fern World 215 Along on each side of the mid veins of the lobes are alternate veinlets. 1992 M. Ingrouille Diversity & Evol. Land Plants 79 The Cycadaceae have pinnae with a single midvein. < as lemmas |
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