From eight chain thru or parallel wave formation: The first two moves of a Spin Chain Thru; i.e., all do a half arm turn (by the right if from facing couples; by whichever arms are joined in waves) then the new centers arm turn 3/4. All take the next call.
NOTE: Also called Spin Chain Thru one half.
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.
