From Longman Dictionary of Contemporary EnglishT-squareT-square /ˈtiː skweə $ -skwer/ noun [countable] AVDTZa large T-shaped piece of wood or plastic used to draw exact plans or pictures
Examples from the Corpus
T-square• Then, with a T-square positioned under the score mark, apply firm pressure to snap the glass.• This jig allows wooden T-square blades to be made or reconditioned, using a conventional plane.• And you had your instruments, your set squares and your T-squares and things. 