Musas
Musas is a Latin form of Musa, meaning “Muse, goddess of poetry and the arts; poem, song”. It is the accusative plural feminine noun or accusative plural masculine noun.
Found 26 times in the Latin texts on Socratos.
Where it is used
Cicero, Letters to his Friends 1.9.23: … e ita multae, ne pertimescas. scripsi etiam (nam animum ab orationibus diiungo fere referoque ad mansuetiores Musas, quae me maxime sicut iam a prima adulescentia e delectarunt)—scripsi igitur Aristotelio more, quem ad modum …
Martial, Epigrammata 7.46.5: Divitibus poteris musas elegosque sonantes
All forms of Musa (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.