epicotyln.

Brit.

/ˈɛpᵻkɒtl/, U.S.

/ˈɛpəˌkɑd(ə)l/

Forms: 1800s– epicotyl, 1900s– epicotyle.

Origin: Formed within English, by derivation. Etymons: epi- prefix, cotyledon n.

Etymology: < epi- prefix + cotyl- (in cotyledon n.), after hypocotyl n. and probably also German epicotyl, adjective (1862 or earlier). Compare French épicotyle (1878 or earlier as adjective ( < German), 1882 in a translation of the source cited in quot. 1880, or earlier, as noun ( < English)).

Botany.

In a plant embryo or seedling: the part of the stem located above the cotyledons. Contrasted with hypocotyl n.

ΘΚΠ

the world > plants > part of plant > reproductive part(s) > seed > [noun] > parts of > plumule or rudimentary shoot

spirec1374

springa1400

sprout?1548

plume1578

spear1647

germen1651

acrospire1675

sprit1682

mistressa1722

plumula1727

plumule1727

plumelet1783

gemmule1844

stem-bud1877

epicotyl1880

1880 C. Darwin & F. Darwin Power of Movement in Plants 5 The stem immediately above the cotyledons will be called the epicotyl or plumule.

1886 S. H. Vines Lect. Physiol. Plants xv. 369 It might be suggested that the nutations of hypocotyls and epicotyls are induced by the action of gravity.

1910 Trans. Connecticut Acad. Arts & Sci. 14 153 At about the period when the cotyledon and the epicotyl have become quite distinct in outline, the formation of an adventitious root occurs near the base of the epicotyl.

1960 K. Esau Anat. Seed Plants ii. 15 Above the radicle is the cotyledonary node.., then follows the epicotyl with several foliar primordia.

2010 In Vitro Cellular & Developmental Biol.: Plant 46 469/2 Epicotyls of 4-wk-old Carrizo seedlings were cut into 1-in sections and incubated in the Agrobacterium suspension for 5 min.

This entry has been updated (OED Third Edition, March 2016; most recently modified version published online March 2022).

单词	epicotyl
释义	epicotyln. Brit. /ˈɛpᵻkɒtl/, U.S. /ˈɛpəˌkɑd(ə)l/ Forms: 1800s– epicotyl, 1900s– epicotyle. Origin: Formed within English, by derivation. Etymons: epi- prefix, cotyledon n. Etymology: < epi- prefix + cotyl- (in cotyledon n.), after hypocotyl n. and probably also German epicotyl, adjective (1862 or earlier). Compare French épicotyle (1878 or earlier as adjective ( < German), 1882 in a translation of the source cited in quot. 1880, or earlier, as noun ( < English)). Botany. In a plant embryo or seedling: the part of the stem located above the cotyledons. Contrasted with hypocotyl n. ΘΚΠ the world > plants > part of plant > reproductive part(s) > seed > [noun] > parts of > plumule or rudimentary shoot spirec1374 springa1400 sprout?1548 plume1578 spear1647 germen1651 acrospire1675 sprit1682 mistressa1722 plumula1727 plumule1727 plumelet1783 gemmule1844 stem-bud1877 epicotyl1880 1880 C. Darwin & F. Darwin Power of Movement in Plants 5 The stem immediately above the cotyledons will be called the epicotyl or plumule. 1886 S. H. Vines Lect. Physiol. Plants xv. 369 It might be suggested that the nutations of hypocotyls and epicotyls are induced by the action of gravity. 1910 Trans. Connecticut Acad. Arts & Sci. 14 153 At about the period when the cotyledon and the epicotyl have become quite distinct in outline, the formation of an adventitious root occurs near the base of the epicotyl. 1960 K. Esau Anat. Seed Plants ii. 15 Above the radicle is the cotyledonary node.., then follows the epicotyl with several foliar primordia. 2010 In Vitro Cellular & Developmental Biol.: Plant 46 469/2 Epicotyls of 4-wk-old Carrizo seedlings were cut into 1-in sections and incubated in the Agrobacterium suspension for 5 min. This entry has been updated (OED Third Edition, March 2016; most recently modified version published online March 2022). < n.1880
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