Another name for ground grain is flour.
Another name for a grain husk is 'hull'.
grain
BRAN
ground grain is grain (aka wheat, barley or other) that is ground up between to hard things to make flour.
Particle size is another name for the term grain size.
Any grain can be ground into flour but the most common grain used is wheat.
Milo is another name for sorghum. It's a type of grain.
Crater
Ground rice is from the rice grain. Semolina is from the wheat grain. Semolina is the one that has gluten.
grist
By which grain it comes from, and how finely ground it is.
A flour mill.