(geology) The collective record of the development of the Earth that is reflected in the preserved rocks, especially sedimentary rocks, from throughout geological history.

(of a material or substance) Similar to rock.

plural of rocking grate

A form of firebars, where sections of the grate may be rocked or tipped to break up clinker within the fire, or to drop the fire after a day's work.

plural of rock rabbit

Synonym of klipdachs

plural of pet rock

A rock one keeps and cares for as if it were a pet, often purchased as a novelty item and jokingly treated as having needs like those of a living animal.

plural of living rock

A genre of music produced by fans of the Harry Potter series, characterized by costumed performances and humorous lyrics about characters, settings, and plot elements from the series.