tri-

a combining form meaning “three,” used in the formation of compound words: triacid; triatomic.

Origin of tri-

Middle English <Latin, combining form representing Latin trēs, tria,Greek treîs, tríathree

Words Nearby tri-

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use tri- in a sentence

And also those that contain norgestimate, which include Ortho-Cyclen and tri-Cyclen.
Birth Control Made My Hair Fall Out, and I’m Not the Only One | Molly Oswaks | October 14, 2014 | THE DAILY BEAST
It was the fall of 2012, and Hurricane Sandy had just devastated the tri-State area.
Making 'The Dog': The Amazing True Story Behind ‘Dog Day Afternoon’ | Allison Berg and Frank Keraudren | August 10, 2014 | THE DAILY BEAST
In a quote usually associated with Bill Stout, designer of the Ford tri-Motor: “Simplicate and add more lightness.”
Why Old-School Airships Now Rule Our Warzones | Bill Sweetman | June 30, 2014 | THE DAILY BEAST
Manhattan was the patient groom in my unspoken arranged marriage, the implicit goal of any tri-state suburban childhood.
I Can’t Shake Hawaii: An Ode to Returning to Places You’ve Been Before | Debra A. Klein | October 7, 2013 | THE DAILY BEAST
I remember Pham Thi Luyen who lived several provinces north in Trieu Ai village, Quang Tri Province.
My Lai 45 Years Later—And the Unknown Atrocities of Vietnam, Iraq, and Afghanistan | Nick Turse | March 16, 2013 | THE DAILY BEAST

My weary shoulders fairly ache as we pass through the constant, or tri-yearly, recurrence of the same experience.
A Fortune Hunter; Or, The Old Stone Corral | John Dunloe Carteret
He rather prided himself on the way he played his part, and wore the tri-color cockade with an air of conviction.
The Light That Lures | Percy Brebner
Sabatier entered more carefully than he was wont to do, his hand upon a pistol thrust into his tri-color sash.
The Light That Lures | Percy Brebner
Tiny Moth planes stood wing to wing with huge tri-motored cabin ships that would hold a dozen passengers each.
The Flying Reporter | Lewis E. (Lewis Edwin) Theiss
Anthropolatry, an-thro-pol′a-tri, n. the giving of divine honours to a human being, a term always employed in reproach.
Chambers's Twentieth Century Dictionary (part 1 of 4: A-D) | Various

British Dictionary definitions for tri-

tri-

prefix

three or thrice: triaxial; trigon; trisect
occurring every three: trimonthly

Origin of tri-

from Latin trēs, Greek treis

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

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