rătĭōcĭnātīvus — Lewis & Short
rătĭōcĭnātīvus, a, um, adj.id..
I In rhet., of or belonging to reasoning, syllogistic, ratiocinative:
genus,Cic. Inv. 1, 13, 17:
quaestio,Quint. 7, 1, 60:
status,id. 7, 8, 3; cf. id. 3, 6, 46; 61; 5, 10, 6.—
II In gram.: ratiocinativa conjunctio, serving for inference, illative, as ergo, igitur, Diom. p. 410 P.