Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Cythnŏs or -us, i, f., = Κύθνος,
- I. one of the Cyclades, now Thermia, Mel. 2, 7, 11; Plin. 4, 12, 22, § 66; Liv. 31, 15, 8; Ov. M. 5, 252; Tac. A. 3, 69; id. H. 2, 8.
Hence,
- II. Cythnius, a, um, adj., of Cythnos, Cythnian: Timanthes Cythnos, Quint. 2, 13, 13.