Incretin (417524005) Definition insulinotropic peptides released by the gastrointestinal tract in response to food; stimulates insulin secretion and inhibits glucagon secretion. [from CRISP]
In simple terms, racism is the belief that distinct human races exist and that one race is superior to another. This definition is generally agreed by the Oxford English Dictionary, Merriam-Webster Dictionary (USA) and the Macquarie Dictionary (Australia).
Racism, by its simplest definition, is discrimination based on race. One with racist beliefs might hate certain groups of people according to their race (i.e., bigotry), or in the case of institutional racism, certain racial groups may be denied rights or benefits.