Definition of beechmast in English:

beechmast

noun

  • [mass noun] The angular brown nuts of the beech tree, pairs of which are enclosed in a prickly case.

    • ‘When beechmast is exhausted, bramblings will flock with other finches on arable land, feeding on any weed seeds or grain.’

Origin

Late 16th century: from beech + mast.

Pronunciation:

beechmast

/ˈbiːtʃmɑːst/