(informal) A style of rock music made by male bands, emphasizing aggressive sexuality.

arena rock

Fine-grained, silt-sized particles of rock generated by mechanical grinding of bedrock by glacial erosion or artificially.

plural of abyssal rock

(geology) An igneous rock that crystallized at considerable depth in the crust; plutonic rock.

A rock from the surface of the moon, but especially any geological specimen brought back by the Apollo program

(Scientology) An erratic slashing motion of an E-meter's needle, supposed to indicate evil intentions in the subject.

plural of rock slam

A rhythmically complex, often guitar-based style of experimental rock music that emerged in the late 1990s.

(slang) A broken shard of ceramic spark plug, used by criminals to silently fracture the glass windows of vehicles.