ladder-ladder used to access the platform.

leotard-one-piece tight-fitting sleeved or sleeveless garment that covers (usually) only the torso. named after Jules Léotard who is considered as the "inventor" of the trapeze.

lines-cords used to secure the performer (e.g. flyer). Usually a symmetrical system with two lines is used for flyers. Catchers are not in lines. Professional swinging trapeze performers use an asymmetrical longe system with a single line (top pulley is in the middle of the crane bar).

listo-spanish word for "ready", used to signify to the catcher that the flyer is ready to go.