thorow-wax
thorow-wax |ˈθʌrəwaks | ▶noun a European plant of the parsley family with yellowish-green flowers, formerly a widespread weed of cornfields. ●Genus Bupleurum, family Umbelliferae: two species, including B. rotundifolium, which is extinct in the wild in Britain. ORIGIN mid 16th cent.: from thorough ‘through ’ + wax 2 (because the stem appears to grow through the leaves ).