• synonyms


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

Historical Examples

  • Then the three coils should trisect dead center, if the models were correct.

    The Crystal Crypt

    Philip Kindred Dick

  • We must trisect the main section, where the largest concentration of buildings is.

    The Crystal Crypt

    Philip Kindred Dick

  • In addition they learned how to bisect and trisect the angle.

  • But while we cannot trisect the angle, we may easily approximate trisection.

    The Teaching of Geometry

    David Eugene Smith

  • A method to trisect a series of angles having relation to each other; also another to trisect any given angle.

British Dictionary definitions for trisect


  1. (tr) to divide into three parts, esp three equal parts
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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 trisect


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

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Online Etymology Dictionary, © 2010 Douglas Harper