T square



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.

Origin of T square

First recorded in 1775–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for t-square

yardstick, rule, measure, straightedge, square

Examples from the Web for t-square

Contemporary Examples of t-square

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

    The Daily Beast logo
    Your Horoscopes: May 15-21

    Starsky + Cox

    May 14, 2011

Historical Examples of t-square

British Dictionary definitions for t-square



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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012