† ˈsanguinistObs. [f. sanguine a. + -ist.] A person (or animal) of a sanguine temperament. 1628Jackson Worthy Churchman 36 To sanguinists we must pipe; to melancholists mourne.1725Bradley's Fam.Dict. II. 5 Y 4, The Black [Horses] with white Marks, are Sanguinists.