Indian millet is a name widely used in different parts of the world to describe a number of different plants. A possibly incomplete list is:
Sorghum bicolor (synonym: Sorghum vulgare) Oryzopsis hymenoides (synonyms: Achnatherum hymenoides, Stipa hymenoides) Panicum miliaceum Penicillaria spicata
All of these are members of the family Poaceae and they are either fodder- or grain-producing plants.