Grain (grn), n. [F. grain, L. granum, grain, seed, small kernel, small
particle. See Corn, and cf. Garner, n., Garnet, Gram the chick-pea,
Granule, Kernel.]
1. A single small hard seed; a kernel, especially of those plants, like
wheat, whose seeds are used for food.
2. The fruit of certain grasses which furnish the chief food of man, as
corn, wheat, rye, oats, etc., or the plants themselves; -- used
collectively.
Storehouses crammed with grain.
Shak.
3. Any small, hard particle, as of sand, sugar, salt, etc.; hence, any
minute portion or particle; as, a grain of gunpowder, of pollen, of
starch, of sense, of wit, etc.