The correct technical term is Caryopsis. Each of loe elements that form a cob, seed. In Colombia we also say grain to acne or pimple, papule, pustule or irritation caused by the bite of an insect.
. belonging to the name of the cereal frutodel-
former unit of weight of the apothecaries, equivalent to 1/7000 of a pound. 72 grains formed a gros.un grain = 0.064798918 gram.