1. Buckwheat, a species of polygonum; a grain cultivated mostly for beasts and poultry; but in the U. States, the flour is much used for making breakfast cakes.
2. In some parts of England and Scotland, a scolding-bridle, an instrument for correcting scolding women. It consists of a headpiece, which incloses the head of the offender, and of a sharp iron which enters the mouth and restrains the tongue.