? Obs. In 6 thorow-. [f. THOROUGH adv. + LEAF sb.] = THOROUGHWAX.
1578. Lyte, Dodoens, I. xcv. 136. Of Thorowwaxe, or Thorowleafe. Thorowleafe hath a round, slender stalke ful of branches, ye branches passing, or going thorow the leaues.
1597. [see THOROUGHWAX].
1866. Treas. Bot., 181. Bupleurum. Hares-ear, Thorow-wax, or Thorow-leaf.