Noun
split S (plural split Ses)
(aviation) An aerobatic maneuver in which an aircraft, starting from upright level flight, rolls inverted and then performs one-half of an inside loop, ending up in upright level flight in the opposite direction at a lower altitude; equivalent to an Immelmann turn (modern sense) performed in reverse.
split-S (plural split-Ses)
Alternative form of split S
split-S