α. see thorough- prefix and leaf n.1
β. see through- prefix and leaf n.1
† thoroughleafn.
Obsolete.
An annual plant with oval perfoliate leaves and umbels of small greenish-yellow flowers with conspicuous bracts, Bupleurum rotundifolium (family Apiaceae); = thoroughwax n.
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the world > plants > particular plants > plants and herbs > according to family > Umbelliferae (umbellifers) > [noun] > thoroughwax or hare's ear
thoroughwax1548
thoroughleaf1578
hare's-ear1597
thoroughwort1597
modesty1809
buplever1881
1578 H. Lyte tr. R. Dodoens Niewe Herball i. xcv. 136 Of Thorowwaxe, or Thorowleafe [Du. Duerwas, Fr. Persefueille]. Thorowleafe hath a round, slender stalke ful of branches, ye branches passing, or going thorow the leaues.
1597 J. Gerard Herball ii. 429 Thorowe waxe or Thorowe leafe, hath a..stalke, diuided into manie small braunches, which passe or go thorow the leaues.
1611 R. Cotgrave Dict. French & Eng. Tongues Perfoliate [Fr.], Through-wax, through-leafe (an hearbe).
1650 J. French tr. Paracelsus Of Nature of Things 139 in tr. M. Sędziwóg New Light of Alchymie There bee many Hearbs, and Rootes, which are denominated not only from the imbred vertue, and faculty, but also from their figure, forme, and representation: As, Devills-bit.., Thorow-leafe.
1710 W. Salmon Botanologia II. 1152/1 Perfoliata vulgaris, Our common Through-Leaf.
?1774 T. G. Cullum Floræ Anglicæ Specimen 101 Bupleurum (rotundifolium)..Thorow-Wax, or Thorow-Leaf.
1866 J. Lindley & T. Moore Treasury Bot. I. 181 Bupleurum. Hare's-ear, Thorow-wax, or Thorow-leaf.
This entry has been updated (OED Third Edition, June 2017; most recently modified version published online March 2022).
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n.1578