Nāĭăs, ădis, and more freq. Nāĭs, ĭdis and ĭdos (plur. ĭdas), f., = Ναϊάς and Ναΐς (floating, swimming, that is in the water),
I a water-nymph, Naiad : illum fontana petebant Numina, Naïades, Ov. M. 14, 328: Aegle Naïadum pulcherrima, Verg. E. 6, 21: Naïs Amalthēa, Ov. F. 5, 115.—Poet. of mixing wine with water: Naïda Bacchus amat, Tib. 3, 6, 57.— Adj. : puellae Naïdes, Verg. E. 10, 10.—
II Transf., in gen., a nymph (Hamadryad, Nereid): Naïda vulneribus succidit in arbore factis, Ov. F. 4, 231: inter Hamadryadas celeberrima Naias, id. M. 1, 691: Naïdes aequoreae, id. ib. 14, 557.—
III The surname probably of a freedwoman : Servilia Naïs, Suet. Ner. 3.— Hence, Nāĭcus , a, um, adj., of the Naids, proceeding from the Naids : dona, Prop. 2, 32, 40.—
B As subst.: Nāĭcus , i, m., a Roman surname , Inscr. Grut. 241, col. 2.— In fem. : ‡ Nāĭcē , Inscr. Fabr. p. 650, n. 433.