From parallel waves: All Step Thru. Those in the center Swing Thru (or Left Swing Thru if starting waves were left hand) and then Turn Thru (or Left Turn Thru). Those facing out Circulate once. Finishes in parallel waves (same hand as starting waves).
Jack Lasry 1971
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.