• synonyms


[trahy-sekt, trahy-sekt]
verb (used with object)
  1. to divide into three parts, especially into three equal parts.
Show More

Origin of trisect

1685–95; tri- + -sect < Latin sectus, past participle of secāre to cut, sever; see section
Related formstri·sec·tion, nountri·sec·tor, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for trisection

Historical Examples

  • There is one trisection which is of more importance than that of the angle.

    A Budget of Paradoxes, Volume II (of II)

    Augustus de Morgan

  • He also contributes to the history of the trisection of an angle.

    The Teaching of Geometry

    David Eugene Smith

  • In other words, the trisection of any angle, by the use of the straightedge and compasses alone, is impossible.

    The Teaching of Geometry

    David Eugene Smith

  • Geometry versus Algebra; or the trisection of an angle geometrically solved.

  • A rule for the cubic equation by which the problem of trisection is solved has been given by Cardan.

    Scientific Studies

    Henry Dircks

British Dictionary definitions for trisection


  1. (tr) to divide into three parts, esp three equal parts
Show More
Derived Formstrisection (traɪˈsɛkʃən), nountrisector, noun

Word Origin

C17: tri- + -sect from Latin secāre to cut
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

Word Origin and History for trisection



1660s (implied in trisection), from tri- "three" + Latin sectus "cut," past participle of secare "to cut" (see section (n.)). Probably patterned on bisect.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper