progressive rock

Progressive rock, sometimes shortened to "prog" or "prog rock", is a form of rock music that evolved in the late 1960s and early 1970s, principally from psychedelic rock, blues rock, folk rock, hard rock, classical music, and jazz fusion, but also from a wide-ranging tendency in rock music at the time to experiment with drawing inspiration from ever more diverse influences.
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Noun
1. a style of rock music that emerged in the 1970s; associated with attempts to combine rock with jazz and other forms; intended for listening and not dancing
(synonym) art rock
(hypernym) rock 'n' roll, rock'n'roll, rock-and-roll, rock and roll, rock, rock music