A dark coating on rock surfaces exposed to the atmosphere, mostly comprising clay and oxides, which grows at only a few micrometers per thousand years; found especially in arid deserts.

(music) A broad genre of popular music, including especially those styles ultimately derived from rock and roll, employing electrical amplification, heavy use of guitars, 4/4 time with strong percussive rhythm on beats two and four (backbeat), and usually themes of bold wildness, rebellion, and sexuality.

The capital city of Arkansas, United States, and county seat of Pulaski County.

plural of rock dove

(intransitive, figuratively) To fall to the lowest possible level.

plural of rock star

plural of rock garden

(landscaping) Synonym of rockery / (cycling) A rock-strewn path, part of a mountain biking racecourse

plural of rock bass

Any fish of the genus Ambloplites, especially of the species Ambloplites rupestris and Ambloplites constellatus. / Epinephelus analogus spotted grouper) / Epinephelus labriformis (starry grouper)