Webster's Revised Unabridged Dictionary · 1913

Calliope

Calliope (kal*lī"o*pe) , noun

[Latin Calliope, Greek Kallio`ph, lit, the beautiful-voiced; pref. kalli- (from kalo`s beautiful) + 'o`ps, 'opo`s, voice.]

1.
(Class. Mythology) The Muse that presides over eloquence and heroic poetry; mother of Orpheus, and chief of the nine Muses.
2.
(Astronomy) 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.
(Zoology) A beautiful species of humming bird (Stellula Calliope) of California and adjacent regions.