From couples back to back: All dancers individually right-face U-turn back (Right Roll or Roll Right to a Wave) to form a right-handed wave with the dancers who were behind them. On Left Roll or Roll Left to a Wave, dancers make a left-face U-turn back to form a left-hand wave with dancers behind them. From a formation of one couple behind another: On the call Leads Roll Right or Left to a Wave, the lead dancers only roll in the direction indicated to form a right or left hand wave with trailers.
Dick Han 1970
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.
