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rocketry the science and technology of designing, building, and flying rockets.
rockfish any of various fishes that live among coastal rocks, such as the striped bass or various groupers.
rock garden a garden established among rocks or provided with rocks that usu. contains alpine or other plants that grow well in rocky places.
rocking chair a chair mounted on rockers or springs that rock back and forth; rocker.
rocking horse a toy horse mounted on springs or rockers that is large enough for a child to ride; hobbyhorse.
rock-'n'-roll a form of popular music derived from rhythm-and-blues, with a strongly accented beat and usu. played on electronically amplified instruments, esp. guitars; rock. [2 definitions]
rock-ribbed characterized by rocky ridges or outcroppings. [2 definitions]
rock salt common salt in solid form, occurring in large irregular rocklike masses; natural sodium chloride.
rockshaft a machine shaft that oscillates or rocks back and forth on its bearings instead of revolving.
rock squirrel a gray, black-headed ground squirrel found in the rocky regions of the western United States and Mexico.
rock star a performer of rock-'n'-roll music who has gained great popularity and fame; rock-'n'-roll star.
rock the boat (slang) to disrupt a balance or routine.
rockweed any of numerous related, coarse, brownish seaweeds that grow on rocks exposed at low tide.
rock wool see mineral wool.
rocky1 having or full of rocks. [3 definitions]
rocky2 likely or tending to rock; shaky; unsteady. [3 definitions]
Rocky Mountain goat a goatlike antelope, found esp. in the mountains of northwestern North America, that has short, black, backward-curving horns and a shaggy white coat.
Rocky Mountains the principal North American mountain chain, stretching from Alaska to northern New Mexico; Rockies.
Rocky Mountain sheep see bighorn.
Rocky Mountain spotted fever a disease caused by a microorganism carried to humans by certain North American ticks that is characterized by high fever, rash, and pain in the muscles and joints.
rococo a style of architecture and decoration originating in France in the eighteenth century and marked by the use of elaborate ornamentation and curved or asymmetric forms. [4 definitions]