From two parallel waves or eight chain thru formation: All arm turn half, new centers arm turn 3/4 and the centers of the wave across the set Trade (this is Spin Chain Thru 3/4). The lonesome outsides have meanwhile done a U-turn back in place. The centers catch the wave ends and Single Hinge and immediately pick up nearest outside dancer and do a Wheel Across.
Herb Moran and Earl Wright 1970
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.