Alternating arching (High) and ducking or diving (Low) down a line of alternately facing couples. Traditionally, an active couple leads to the right to circle half and then does a "Dip and Dive Six." They dive through the first couple, arch over the next, then do a California Twirl on the outside to dive and arch across to the starting point. Each couple, when they reach the outside, do a California Twirl to dip and dive back through to starting point.
This definition is from The Handbook of Modern Square Dancing by Jay King.
It is provided here for informational and educational purposes only.