Lewis & Short

suc-căvus (subc-), a, um, adj., hollow below or underneath (ante- and postclass.): areae, Cato, R. R. 151, 3: loca, Lucr. 6, 557; Auct. Limit. pp. 252, 260, 303 Goes.: natura Aetnae, Lucr. 6, 682.