From parallel waves: Those facing in step ahead to form a wave in the center. Ends facing out roll back and arm turn end dancer in the wave 3/4 and spread. The other people facing out (centers) do a Cloverleaf movement and step in on the inside beside dancer who was adjacent to them in the original wave to form a couple. The two in the center arm turn one quarter (by joined arms) and step straight ahead to the inside position of a couple facing out. Finishes in parallel two-faced lines.
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.