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).
According to dictionary.com, the definition of racism is the prejudice that members of one race are intrinsically superior to members of other races or discriminatory or abusive behavior towards members of another race.. Notice that one definition involves a belief while another involves an action.