Also: straddle split; box split; Chinese split; cut split
Samakonasana
A split in which the legs are extended to the left and right, mirrored from a back or front view, until a 180 degree angle between the legs is reached.
Oversplits can be achieved, but usually take significatly more training than a front split would.
Definition based on the Contortion Glossary by Greg Ullman and Tige Young