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 (trī′sĕkt′, trī-sĕkt′)
tr.v. tri·sect·ed, tri·sect·ing, tri·sects
To divide into three equal parts.

tri′sec′tion (trī′sĕk′shən, trī-sĕk′-) n.
tri′sec′tor (trī′sĕk′tər, trī-sĕk′-) n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Last year he redesigned the bar at the Palms Casino Resort, complete with trisected shark, as part of a $620m renovation by Frank and Lorenzo Fertitta.
The proximal 1/3 of the colon was removed, and the remaining 2/3 of the colon was bisected or trisected longitudinally.
Upon the initial grossing of the specimens, 25 of the 47 biopsies (53%) were bisected, 15 (32%) were trisected, 6 (13%) were quadrisected, and 1 case (2%) was sectioned into 6 pieces.
That, as I see it, is the benefit of this trisected structure (which, I should note, could just as well be bisected or quadrisected; divide it any way you like).
He stands in the middle of a rectangular picture plane trisected into three bands: the foreground on which the figure stands, the scythed field and the broad empty blue stripe of the overhanging sky.
They sought to view everyday objects such as wine glasses, bottles, and musical instruments, as well as portraits and landscapes, as no longer being in two dimensions, but as trisected elements, as though the human eye could see around corners even when looking at a flat object.
Despite (some say, because of) reforms that, in 1791, produced Europe's first written constitution, the Commonwealth was ultimately subjugated and trisected by neighboring Austria, Prussia, and Russia.