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  1. See-saw; a movement that as the leg moves forward and backwards the body bends in the opposite direction
  2. Short for battements en balançoire, ["battements like a seesaw"]. The dancer swings the working leg vigorously back and forth between fourth position front and fourth back, through first position. Unlike grand battements en cloche, balançoires do not require that the body be held straight. Source: Vance's Fantastic - BALLET DICTIONARY