root-leafn.

Brit.

/ˈruːtliːf/, U.S.

/ˈrutˌlif/,

/ˈrʊtˌlif/

Origin: Formed within English, by compounding. Etymons: root n.¹, leaf n.¹

Etymology: < root n.¹ + leaf n.¹

Botany.

A leaf arising from the base of a stem; a radical leaf.

ΘΚΠ

the world > plants > part of plant > leaf > [noun] > root-leaf

root-leaf1712

1712 Philos. Trans. 1710–12 (Royal Soc.) 27 385 The Root-leaves [of sciatica cresses] stand on long foot-stalks.

1796 W. Withering Arrangem. Brit. Plants (ed. 3) II. 198 The root-leaves..are never wing-cleft.

1852 A. Pratt Wild Flowers I. 154 Though the common shape of those [leaves] on the stem varies very much, yet the root-leaves taper towards the end, and are at the base arrow shaped.

1870 J. D. Hooker Student's Flora Brit. Islands 359 Spiranthes autumnalis,..flowering-stem sheathed distinct from the root-leaves.

1912 H. S. Thompson Sub-Alpine Plants ii. 282 One solitary root-leaf, linear, narrower at each end.

1994 R. Stephenson Sedum (2002) iv. 82 A second characteristic unique to subgenus Rhodiola is the existence of root-leaves, which often have very wide bases, a petiole, and then wider apices.

This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022).

单词	root-leaf
释义	root-leafn. Brit. /ˈruːtliːf/, U.S. /ˈrutˌlif/, /ˈrʊtˌlif/ Origin: Formed within English, by compounding. Etymons: root n.¹, leaf n.¹ Etymology: < root n.¹ + leaf n.¹ Botany. A leaf arising from the base of a stem; a radical leaf. ΘΚΠ the world > plants > part of plant > leaf > [noun] > root-leaf root-leaf1712 1712 Philos. Trans. 1710–12 (Royal Soc.) 27 385 The Root-leaves [of sciatica cresses] stand on long foot-stalks. 1796 W. Withering Arrangem. Brit. Plants (ed. 3) II. 198 The root-leaves..are never wing-cleft. 1852 A. Pratt Wild Flowers I. 154 Though the common shape of those [leaves] on the stem varies very much, yet the root-leaves taper towards the end, and are at the base arrow shaped. 1870 J. D. Hooker Student's Flora Brit. Islands 359 Spiranthes autumnalis,..flowering-stem sheathed distinct from the root-leaves. 1912 H. S. Thompson Sub-Alpine Plants ii. 282 One solitary root-leaf, linear, narrower at each end. 1994 R. Stephenson Sedum (2002) iv. 82 A second characteristic unique to subgenus Rhodiola is the existence of root-leaves, which often have very wide bases, a petiole, and then wider apices. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022). < n.1712
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