clear, colourless form of the silica-based mineral quartz, often called "pure quartz" or "clear quartz".

plural of Roche limit

plural of rocket propelled grenade

plural of rocket belt

plural of rocket-pack

(informal) To progress in a smooth fashion.

present participle of rock along

(simile, sometimes sarcastic) to travel through the air with little or no benefit from aerodynamic lift

(uncountable) rocket, arugula / (countable) a salad that uses the leaves of this plant as its main ingredient

(music) A subgenre of heavy metal which combines it with elements of psychedelic rock and acid rock.