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rock1 a large mass of hard mineral matter that lies under the earth's soil or forms a cliff, mountain, or the like. [4 definitions]
rock2 to sway strongly back and forth or from side to side. [9 definitions]
rockabilly rock-'n'-roll music combined with or influenced by country and western styles.
rock and rye a bottled combination of rye whiskey, rock candy, and fruit.
rockaway a light, four-wheeled, horse-drawn carriage with two or three seats and a fixed top.
rock bass an edible, freshwater game fish of eastern North America, related to the sunfish.
rock bottom the very lowest point or level.
rock-bound bounded by rocks, as a coastline.
rock brake any of various related ferns that grow in rocky soil.
rock candy large, clear, hard nuggets of crystallized sugar.
rock climbing the activity or sport of climbing sheer rock faces using special techniques, tools, and safety equipment such as ropes and harnesses.
Rock Cornish a hybrid chicken produced by mating White Rock and Cornish stock.
rock crystal clear, esp. colorless, quartz.
rock dove a European wild pigeon from which most common and domesticated pigeons are derived.
rocker one of the curved elements on the bottom of a chair, cradle, or other device to allow for rocking motion. [3 definitions]
rocker arm a pivoted lever or arm attached to a moving or stationary shaft, used to transfer a rocking or pushing motion, as in an automotive engine.
rocker panel any of the panels on the body and beneath the doors of an automotive vehicle.
rocket1 a tube propelled by the gases ejected from the rear that are the product of fuels or explosives ignited and burned inside the tube, used for fireworks, flares, and airborne weapons, and for launching spacecraft and missiles. [6 definitions]
rocket2 a plant found in Europe and Asia that has yellow-white flowers and edible leaves. [2 definitions]
rocket launcher a weapon that is carried by hand or mounted on a vehicle and fires rockets, or a vehicle designed to carry a battery of such weapons.
rocketry the science and technology of designing, building, and flying rockets.