noun
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rotation - a) a rotating or being rotated; b) the spinning motion around the axis of a celestial body; c) regular and recurring succession of changes; frequency.
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water in rapid, violent, whirling motion caused by two meeting currents, by winds meeting tides, etc. and tending to form a circle into which floating objects are drawn; a whirlpool.
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anything like a whirlpool, as in violent motion.
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a turning oneself in the air and standing erect on ground, a particular stance in wrestling.
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the act or process of mixing metals to form an alloy.
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repeated mental or physical action for the purpose of learning or acquiring proficiency; practice.