thimblet-sort of grooved ring inserted in a loop to protect ropes and steel cables.

throw-out-cloud-swing move. Lower legs wrapped front to back, at front of swing you let go of ropes and reach forward, so you end up doing a big dive, suspended by your ankles.

trap (trapeze bar)-plain steel or stainless steel bar; its form depends on the use (flying trapeze bar, catch trapeze bar, swinging trapeze bar, Washington trapeze bar,...).

turnbuckle-device used to adjust tension in cables. Has two screws with rings, hooks or forks and a central threaded sleeve.

tuck-knees into chest and feet into bum.

twisting belt-safety belt made specifically for practicing somersaults and cutaways etc... It has a metal "track" which allows the lines to move around the flyer's body as he twists, without becoming entangled.