"harsh-sounding steam-whistle keyboard organ," 1858, named incongruously for Calliope, ninth and chief muse, presiding over eloquence and epic poetry, Latinized from Greek Kalliope, literally "beauty of voice," from kalli-, combining form of kallos "beauty" (see Callisto) + opos (genitive of *ops) "voice," from PIE root *wekw- "to speak."
calla
caller
call-girl
calligraphy
calling
calliope
calliper
callipygian
Callisto
callithumpian
callosal