(1):
(n.) A short piece of pipe having a lateral outlet, used to connect a line of pipe with a pipe at a right angle with the line; - so called because it resembles the letter T in shape.
(2):
(n.) The nodule of earth from which the ball is struck in golf.
(3):
(n.) The mark aimed at in curling and in quoits.
(4):
(v. t.) To place (the ball) on a tee.
(5):
(n.) The letter T, t; also, something shaped like, or resembling in form, the letter T.