LSJ
ης, ἡ, Aeol. Μοῖσα Sappho 84, IG4²(1).130.16, etc. ; Dor. Μῶσα Alcm. 1, etc. ; Lacon. Μῶἁ (for Μῶσα) Ar. Lys. 1298, cf. An.Ox. 1.277; — Muse, Ὀλυμπιάδες Μ., Διὸς αἰγιόχοιο θυγατέρες Il. 2.491, cf. Hes. Th. 25, etc. ; nine in number, first in Od. 24.60; named in Hes. Th. 75 sqq. μοῦσα, as Appellat., music, song, μ. στυγερά A. Eu. 308 (anap.); εὔφαμος Id. Supp. 695 (lyr.); καναχὰν… θείας ἀντίλυρον μούσας S. Tr. 643 (lyr.); Αἰακῷ μοῖσαν φέρειν Pi. N. 3.28; τίς ἥδε μοῦσα ; what strain is this ? E. Ion 757; ἄλυρος μ. Id. Ph. 1028 (lyr.); διὰ μούσας ᾖξα Id. Alc. 962 (lyr.); in Prose, ᾄδειν ἀδόκιμον μ. Pl. Lg. 829d; in pl., μοῦσαι Σφιγγός, of the Sphinx΄s riddle, E. Ph. 50; esp.
liberal arts, accomplishments, τὰς μούσας ἀφανίζων Ar. Nu. 972; ἀπαίδευτον τῶν περὶ τὰς νυμφικὰς μ. Pl. Lg. 775b; also in sg., τῆς ἀληθινῆς μ. ἠμεληκέναι Id. R. 548b; κοινωνεῖν μούσης ib. 411c. αὕτη ἡ Σωκράτους μ. that was Socrates΄s way, Gal. UP 1.9.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)