A kind of small British fruitcake with a rough surface resembling a rock.

A cock rock musician or fan.

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

arena rock

A rocket-propelled vehicle constrained to run on a rail, used for experimental purposes.

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

Alternative spelling of rock and roll

(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

(space science) A suborbital rocket used to launch upper atmosphere, exoatmospheric, and microgravity sondes or probes.