grain

the physical composition of something (especially with respect to the size and shape of the small constituents of a substance)

“sand of a fine grain”

a cereal grass

“wheat is a grain that is grown in Kansas”

a relatively small granular particle of a substance

“a grain of sand”

paint (a surface) to make it look like stone or wood

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 side of leather from which the hair has been removed

the smallest possible unit of anything

“there was a grain of truth in what he said”

thoroughly work in

“His hands were grained with dirt”

form into grains

become granular

a weight unit used for pearls or diamonds: 50 mg or 1/4 carat

dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn