Rice is a cereal grain, and in its domesticated form is the staple food for over half of the world's human population, particularly in Asia and Africa. Rice is the seed of the grass species Oryza sativa or, much less commonly, O. glaberrima.

Rice is a cereal grain, and in its domesticated form is the staple food for over half of the world's human population, particularly in Asia and Africa. Rice is the seed of the grass species Oryza sativa or, much less commonly, O. glaberrima.