T square

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

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

Word History and Origins

Origin of T square¹

First recorded in 1775–85

Example Sentences

The full moon, Tuesday, in a T-square formation with the Sun and Neptune, urges you to balance your will with your want.

From The Daily Beast

A T square, with a blade 24 inches long attached permanently to the stock, but not sunk into it.

From Project Gutenberg

I reached the chart table, almost falling over my leaden feet, seized a short permal T-square, and levered the cover up.

From Project Gutenberg

"Yes, it's a pretty good day," allowed Uncle Bart judicially as he took a squint at his T-square.

From Project Gutenberg

The paper should not come quite to the edge of the drawing-board, so as to interfere with the head of the T-square.

From Project Gutenberg

Never use a T-square, triangle or ruling pen in inking-in lettering.

From Project Gutenberg