a plant, especially Fagopyrum esculentum, cultivated for its triangular seeds, which are used as a feed for animals or made into a flour for human consumption, as in pancakes or cereal. Compare buckwheat family.
2.
the seeds of this plant.
3.
Also, buckwheat flour. flour made from seeds of buckwheat.
1540s, from M.Du. boecweite "beech wheat" (cf. Dan. boghvede, Swed. bohvete, Ger. Buchweizen), so called from resemblance between grains and seed of beech trees. Possibly a native formation on the same model as the Dutch word.