Buckwheat

1. n. The triangular seed used, when ground, for griddle cakes, etc.
2. n. A plant (Fagopyrum esculentum) of the Polygonum family, the seed of which is used for food.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.