- a relatively small granular particle of a substance;
"a grain of sand" "a grain of sugar"
- foodstuff prepared from the starchy grains of cereal grasses
- the side of leather from which the hair has been removed
- a weight unit used for pearls or diamonds: 50 mg or 1/4 carat
- 1/60 dram; equals an avoirdupois grain or 64.799 milligrams
- 1/7000 pound; equals a troy grain or 64.799 milligrams
- dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn
- a cereal grass;
"wheat is a grain that is grown in Kansas"
- the smallest possible unit of anything;
"there was a grain of truth in what he said" "he does not have a grain of sense"
- the direction, texture, or pattern of fibers found in wood or leather or stone or in a woven fabric;
"saw the board across the grain"
- the physical composition of something (especially with respect to the size and shape of the small constituents of a substance);
"breadfruit has the same texture as bread" "sand of a fine grain" "fish with a delicate flavor and texture" "a stone of coarse grain"