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

2. (n.) One of the asteroids. See Solar.

3. (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.

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

Hammond organ Mark baroque organ bazooka calliophone choralcelo electric organ electro-pneumatic organ harmonium hedgehog hydraulic organ launch pad launching pad launching platform launching tube melodeon melodica mousetrap orchestrelle organ organophone pipe organ projector reed organ seraphine silo steam organ symphonion tracker-action organ tubular-pneumatic organ vocalion