Lewis & Short

Castălĭa, ae, f., = Κασταλία,

  1. I. a fountain on Parnassus, sacred to Apollo and the Muses, Liv. Andron. ap. Fest. p. 310, b Müll.; Verg. G. 3, 293; Hor. C. 3, 4, 61; Stat. Th. 1, 698.
  2. II. Hence the adjj.,
    1. A. Castă-lĭus, a, um, Castalian: fons, Plin. 4, 3, 4, § 8; Sen. Oedip. 229; cf. fontes, Stat. Th. 1, 565: arbor, the laurel, Prop. 3 (4), 3, 13; hence, umbra, Tib. 3, 1, 16: antrum, i. e. the cave of the oracle at Delphi, Ov. M. 3, 14.
    2. B. Castălis, ĭdis, f., Castalian: unda, Mart. 9, 19 fin.: sorores, i. e. the Muses, id. 4, 14; also as subst.: Castalidum grex, id. 7, 12, 10.