| 单词 | acropetal | 
| 释义 | acropetaladj.  Tending or moving towards the summit or apex; (Botany) produced, developing, or opening successively from the base or point of attachment upwards (contrasted with basipetal). ΚΠ 1873    Jrnl. Bot., Brit. & Foreign 11 184  				Those who know anything of the development of leaves will at once recall to memory their well-known acropetal mode of development. 1915    W. L. Balls Devel. & Properties Raw Cotton ii. 43  				The development of these various branches is mainly acropetal and centrifugal, or, in other words, a branch high up the main stem is younger than a lower branch. 1972    McGraw-Hill Yearbk. Sci. & Technol. 1971 285/2  				Acropetal and basipetal movements of morphactin through the parenchyma of coleoptiles were at the same rates. 2001    Ann. Bot. 88 1188/2  				Leaf inception at the shoot tip, however, nearly always occurs in an acropetal order. This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021). <  | 
	
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