buckwheat
Concise Oxford English Dictionary © 2008 Oxford University Press:
buckwheat/ˈbʌkwiːt/
▶noun an Asian plant of the dock family, producing starchy seeds used for fodder or milled into flour. [Fagopyrum esculentum.]
– origin C16: from MDu. boecweite ‘beech wheat’, its grains being shaped like beechmast.
'buckwheat' also found in these Oxford entries:

