Ultramafic Rock

Science / Geology / Ultramafic Rock: An igneous rock consisting dominantly of mafic minerals, containing less than 10 percent feldspar. Includes dunite, peridotite, amphibolite, and pyroxenite.

Other Words for Rock

Rock Noun Synonyms: stone, boulder
Rock Adjective Synonyms: crag, tor, escarpment, scarp, outcrop, outcropping
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Ultrabasic Rock

Science / Geology / Ultrabasic Rock: An igneous rock with a very low silica content and rich in minerals such as hypersthene, augite and olivine. These rocks are also known as ultramafic rocks. MORE

Rocker Step

Entertainment / Basketball / Rocker Step: An offensive move consisting of a jab step followed by a step backward; the player can either shoot or drive, depending on the movement of the defender. MORE

Rocker Arm

Technology / Motorcycle / Rocker Arm: A centrally pivoted lever that transmits the motion of the camshaft to open and close the valves. MORE

Rockered Blades

Entertainment / Ice Hockey / Rockered Blades: Used by professional ice hockey skaters; the gentle curve in a very sharp blade of an ice skate produced by rounding the toe and heel of the blade to make it easier for hockey players to turn quickly. MORE

Rocket Scientist

Business / Finance / Rocket Scientist: An employee of an investment firm (often having a Ph.D. in physics or mathematics) that works on highly mathematic models of derivative pricing. MORE

Rocketsonde

Science / Weather / Rocketsonde: A type of radiosonde that is shot into the atmosphere by a rocket, allowing it to collect data during its parachute descent from a higher position in the atmosphere than a balloon could reach. MORE

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