'Buckwheat' definitions:

Definition of 'buckwheat'

From: WordNet
noun
A member of the genus Fagopyrum; annual Asian plant with clusters of small pinkish white flowers and small edible triangular seeds which are used whole or ground into flour [syn: buckwheat, Polygonum fagopyrum, Fagopyrum esculentum]
noun
Grain ground into flour

Definition of 'Buckwheat'

From: GCIDE
  • Buckwheat \Buck"wheat`\, n. [Buck a beech tree + wheat; akin to D. boekweit, G. buchweizen.]
  • 1. (Bot.) A plant (Fagopyrum esculentum) of the Polygonum family, the seed of which is used for food. [1913 Webster]
  • 2. The triangular seed used, when ground, for griddle cakes, etc. [1913 Webster]