a cereal grass cultivated in temperate areas for its grain, which yields a fine white flour
any of several species of cereal grasses cultivated in temperate areas for a grain that yields a fine white flour used for making bread, pasta, etc: genus Triticum
separate the wheat from the chaff
to separate or distinguish what is useful from what is worthless
An editor is someone who separates the wheat from the chaff and then prints the chaff — Adlai Stevenson
[Old English hwǣte]