Rock Flour: A glacial sediment of extremely fine (silt-and clay-size) ground rock formed by abrasion of rocks at the base of the glacier.
Rocker: A broad-ended tool with a sharp-toothed curved base which is used to ground a mezzotint plate. It is so called because it is applied with a rocking motion.
Rocked: Big hit
Rocker Arm: A centrally pivoted lever that transmits the motion of the camshaft to open and close the valves.
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.
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 tur . . . View Full Definition
Rock Salt: A chemical sedimentary rock that forms from the evaporation of ocean or saline lake waters. It is also known by the mineral name 'halite'. It is rarely found at Earth's surface, except in ar . . . View Full Definition
Rock Glacier: A mass of rock material, cemented together by ice, that flows down a slope under the force of gravity much like the motion of a glacier.
Rock And Rye: An amber-colored American liqueur originally made from rye whiskey and rock candy.
Rock And Roll: American popular music style first heard in the 1950s: derived from the union of African-American rhythm and blues, country-western, and pop music.