sanguineo-|sæŋˈgwɪnɪəʊ|used as combining form of L. sanguineus sanguineous, sanguine a., prefixed (with hyphen) to adjs., forming physiological terms with the sense ‘partly sanguineous (or sanguine) and partly something else’; also in sanguineo-ˈvasculara., pertaining to blood-vessels. Cf. sanguino-.1803Med.Jrnl. IX. 417 Of a sanguineo phlegmatic temperament.1845Encycl.Metrop. VII. 257/1 Sanguineo-vascular Ganglia.1846G. E. Day tr.Simon's Anim.Chem. II. 144 The sanguineo-bilious temperament.1879Leighton Lichen-Flora (ed. 3) 521 Sanguineo-black, blood-red black.