vē-sānus (vae-sān-), a, um, adj., not of sound mind, mad, insane (mostly poet.). Lit.: remex, Cic. Div. 2, 55, 114: homo, id. Dom. 2, 3: tribunus plebis, id. ib. 21, 55: poeta, Hor. A. P. 455: stella vesani Leonis, fierce, raging, id. C. 3, 29, 19.

— Impetuous: urbem cuidam Alexander donabat vesanus, Sen. Ben. 2, 16, 1: Caesaris agmen, Luc. 7, 496.

— Transf., of inanim. and abstract things, fierce, wild, savage, furious, raging: vultus, Liv. 7, 33, 17: impetus, id. 9, 13, 3: manus, Prop. 2, 9, 10: vires, Ov. Am. 1, 7, 25: vesani murmura ponti, Prop. 1, 8, 5: flamma, Cat. 100, 7: fames, Verg. A. 9, 340: pontus, Manil. 5, 343: mero Regia, Luc. 8, 401.