acropetaladj.

Brit.

/əˈkrɒpᵻtl/, U.S.

/əˈkrɑpɛdl/

Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: acro- comb. form, -petal comb. form.

Etymology: < acro- comb. form + -petal comb. form, after German acropetal (1868 or earlier).

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).

单词	acropetal
释义	acropetaladj. Brit. /əˈkrɒpᵻtl/, U.S. /əˈkrɑpɛdl/ Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: acro- comb. form, -petal comb. form. Etymology: < acro- comb. form + -petal comb. form, after German acropetal (1868 or earlier). 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). < adj.1873
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