Jump To:

• T square
  T square

  noun

  a T -shaped ruler, used primarily in mechanical drawing, having a short crosspiece that slides along the edge of the drawing board as a guide to the perpendicular longer section in making parallel lines, right angles, etc., and as a support for triangles.
• T-square
  T-square

  noun

  a T-shaped ruler used in mechanical drawing, consisting of a short crosspiece, which slides along the edge of the drawing board, and a long horizontal piece: used for drawing horizontal lines and to support set squares when drawing vertical and inclined lines

T square

American  

noun

1. a T -shaped ruler, used primarily in mechanical drawing, having a short crosspiece that slides along the edge of the drawing board as a guide to the perpendicular longer section in making parallel lines, right angles, etc., and as a support for triangles.

---

T-square British  

noun

1. a T-shaped ruler used in mechanical drawing, consisting of a short crosspiece, which slides along the edge of the drawing board, and a long horizontal piece: used for drawing horizontal lines and to support set squares when drawing vertical and inclined lines

---

Etymology

Origin of T square

First recorded in 1775–85

Example Sentences

And out on the Margaritaville scene, the military was the only presence with the posture of a T square.

From Time Magazine Archive

At war's beginning, Puleston laid aside his brushes and went back to the drawing board with a T square.

From Time Magazine Archive

We’ll each make a flying craft/object/thing out of clay, and then we’ll have a contest to see whose flings the farthest across the room off of a big metal T square mounted to his desk.

From "Popcorn" by Rob Harrell

In the works of Messrs. Jackson and Graham, this is done by setting the pieces in a metal T square.

From British Manufacturing Industries Pottery, Glass and Silicates, Furniture and Woodwork. by Arnoux, L.

In his model the double parallel ruler is replaced by two endless strings and pulleys, and the bar, B C, by a T square.

From Scientific American Supplement, No. 794, March 21, 1891 by Various