Lewis & Short

rătītus, a, um, adj. [ratis], marked with the figure of a raft: ratitum quadrantem dictum putant, quod in eo et triente ratis fuerit effigies, ut navis in asse, Paul. ex Fest. p. 275 Müll.; so, quadrantes, Lucil. ap. Varr. L. L. 5, § 44 ib. (cf. Plin. 33, 3, 13, § 45).