Cereal
Videos
A cereal is a grass cultivated for its edible grain. Cereals are the world's largest crops, and are therefore staple foods. They include rice, wheat, rye, oats, barley, millet, and maize. Edible grain
Harvesting a cereal with a combine harvester accompanied by a tractor and trailer.
Cereal grains: (top) pearl millet, rice, barley (middle) sorghum, maize, oats (bottom) millet, wheat, rye, triticale
Threshing of grain in ancient Egypt
Roman harvesting machine
Whole grain
Videos
A whole grain is a grain of any cereal or pseudocereal that contains the endosperm, germ, and bran, in contrast to refined grains, which retain only the endosperm.
African rice in its inedible husk (seed rice, can sprout)
The same rice, dehusked (whole grain rice, colour varies by variety)
The same rice, with almost all bran and germ removed to make white rice
USDA wheat