Definition of thorow-wax in English:

thorow-wax

noun

  • A European plant of the parsley family with yellowish-green flowers, formerly a widespread weed of cornfields.

    • ‘The conspicuous herbaceous cover of the spruce forests includes the ornamentals monkshood (Aconitum leucostomum), colombine (Aquilegia karelinii), thorow-wax (Bupleurum longifolium) and dragonhead (Dracocephalum integrifolium).’
    • ‘Species lost to the UK in recent years include corncockle, thorow-wax and small bur-parsley.’

Origin

Mid 16th century: from thorough ‘through’ + wax (because the stem appears to grow through the leaves).

Pronunciation

thorow-wax

/ˈθʌrəwaks/