1. (n.) One who rocks; specifically, one who rocks a cradle.

2. (n.) One of the curving pieces of wood or metal on which a cradle, chair, etc., rocks.

3. (n.) Any implement or machine working with a rocking motion, as a trough mounted on rockers for separating gold dust from gravel, etc., by agitation in water.

4. (n.) A play horse on rockers; a rocking-horse.

5. (n.) A chair mounted on rockers; a rocking-chair.

6. (n.) A skate with a curved blade, somewhat resembling in shape the rocker of a cradle.

7. (n.) Same as Rock shaft.

burin clarifier colander cradle cribble die engraving tool etching ball etching ground etching needle etching point filter graver intaglio lixiviator metronome needle oscillator pendulum percolator point punch purifier refiner refinery riddle rocking chair rocking stone scorper screen seal seesaw shuttle shuttlecock sieve sifter stamp strainer style swing teeter teeter-totter teeterboard teetery-bender vibrator winnow winnowing basket winnowing fan winnowing machine