Rice is the seed of the monocot plants.
As a cereal grain, it is the most important staple food for a large part of the world's human population. It is the grain with the second-highest worldwide production, after maize.
The seeds of the rice plant are first milled using a rice huller to remove the chaff (the outer husks of the grain). At this point in the process, the product is called brown rice. The milling may be continued, removing the bran, the rest of the husk and the germ, thereby creating white rice. White rice, which keeps longer, lacks some important nutrients; in a limited diet which does not supplement the rice, brown rice helps to prevent the disease beriberi.