1. : a dive done in either pike or layout position from a springboard or platform in which the diver executes a half turn of the body on a longitudinal axis before entering the water — compare full twist
2. : a half turn of the body in the air on a longitudinal axis executed alone or in conjunction with other maneuvers (as on a trampoline, from a springboard, or in vaulting)
* * *
1. Diving. a dive made by a half rotation of the body on its long axis. Cf. full twist.
2. the twisting of the body in a half-turn, as in tumbling.
Useful english dictionary. 2012.