Semolina is also called rava or sooji. This is made of refined, granulated whole wheat. It is generally made of a type of wheat called mottai godumai, and it’s ground finely for batters and coarsely when used as the main ingredient.
It is a flour ground from middlings of durum wheat, a hard wheat variety. (Durum is the Latin word for hard.) The finer flour from durum wheat is used to make semolina pasta flour and “00” flour (doppio zero flour), an ingredient in pizzas and pastas. The endosperm that’s left after milling the fine flour is then ground up and sold as semolina flour.
It is a finer grain that still produces a gritty end product with an almost cornbread-like texture.