Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

rhomphaea, ae (pure Latin form, rumpīa, Gell. 10, 25, 2; with i short, rumpĭa, Val. Fl. 6, 98), f., = ῤομφαία, a long missile weapon of barbarous nations: rumpia genus teli est Thracae nationis, Gell. 10, 25, 4; Liv. 31, 39, 11: bis acuta, Vulg. Ecclus. 21, 4; id. Apoc. 2, 12; Val. Fl. l. l.; Claud. Epigr. 27; Ascon. Argum. Milon.
Hence, rhomphaeālis, e, adj., of or belonging to the rhomphaea: incendium, Prud. Cath. 7, 93.