[OED idem, but cf. DAE a variety of maize, because it was introduced from the Guinea coast of Africa or "because speckled like a guinea-fowl"] n. a variety of millet (Sorghum vulgare): 1786 Guinea corn: 10½ rls. [reales] the bushel (Bahama Gazette). 1979 Guinea corn is mostly grown in the Family Islands; it grows like corn, but it has a smaller seed (Burrows 95). Guinea corn is black and white Indian corn is red and bigger (San Sal.). (Black)