Calliope n. : The Muse that presides over eloquence and heroic poetry; mother of Orpheus, and chief of the nine Muses.

Calliope n. : One of the asteroids. See Solar.

Calliope n. : 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.

Calliope n. : A beautiful species of humming bird (Stellula Calliope) of California and adjacent regions.

Example:
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Taxonomy
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Defination from the web:
calliope is a musical instrument that produces sound by sending a gas, originally steam or more recently compressed air, through large whistles, ... In Greek mythology, Calliope was a daughter of Zeus, chief of the Muses and mother of Orpheus. ...