Cal‐li″o‐pe (kăl‐lī″ō̍‐pē̍), n. [L. Calliope, Gr. Καλλιόπη, lit, the beautiful-voiced; pref. καλλι- (from καλόσ beautiful) + ὄψ, οπὄσ, voice.] 1. (Class. Myth.) The Muse that presides over eloquence and heroic poetry; mother of Orpheus, and chief of the nine Muses.
2. (Astron.) One of the asteroids. See Solar.
3. A musical instrument consisting of a series of steam whistles, toned to the notes of the scale, and played by keys arranged like those of an organ. It is sometimes attached to steamboat boilers.
4. (Zoöl.) A beautiful species of humming bird (Stellula Calliope) of California and adjacent regions.