I.without reason, irrational (postAug.): “animal,” Quint. 7, 3, 3; 24; Sen. Ep. 113, 17; 118, 14; “124, 23: usus,” mechanical exercises, Quint. 10, 7, 11: “anima,” Tert. Poen. 12.—Subst.: irrătĭōnālĭa , ĭum, n. plur., things or creatures without reason: “de irrationalibus,” Quint. 8, 6, 13.—Adv.: irră-tĭōnālĭter , irrationally, Tert. adv. Marc. 2, 6 al.
irrătĭōnālis (inr- ), e, adj. 2. in-rationalis,