| 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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