Lewis & Short

Dryădes, um (dat. Graec. dryasin, Prop. 1, 20, 12; dub. al. adryasin; cf. ib. 32 and 34), f., = Δρυάδες, wood-nymphs, dryads, Prop. 1, 20, 45; Verg. E. 5, 59; id. G. 1, 11; Ov. M. 3, 507; 6, 453 al.
In the sing., Dryas, Mart. 9, 62.