Siphnus (-os), i, f.,
I one of the Cyclades , now Sifano , Mel. 2, 7; Plin. 4, 12, 22, § 66; 36, 22, 44, § 159.
II —Hence, Siphnĭus , a, um, adj., Siphnian : lapis, Plin. 36, 22, 44, § 159.