Lewis Short
(adjective) : sŭb-absurdus, a, um
* Somewhat or rather absurd (Ciceronian): sunt illa subabsurda,Cic. de Or. 2, 67, 274: subabsurda dicere,id. ib. 2, 71, 289: tempus discessūs,id. Att. 16, 3, 4: incompositus, reconditus et, quo Cicero utitur, subabsurdus,Quint. 1, 5, 65; cf. id. 6, 3, 23; 6, 3, 99.—Adv.: sŭbabsurdē, somewhat absurdly: aliquid subabsurde dicere,Cic. de Or. 2, 68, 275.
Charlton T. Lewis, Charles Short, A Latin Dictionary