tri-
Americanprefix
-
three or thrice
triaxial
trigon
trisect
-
occurring every three
trimonthly
Usage
What does tri- mean? Tri- is a combining form used like a prefix meaning “three.” Tri- is often used in a great variety of both everyday and technical terms.Tri- ultimately comes from both Greek treîs, tría and Latin trēs, tria, all of which mean “three.”
Etymology
Origin of tri-
Middle English < Latin, combining form representing Latin trēs, tria, Greek treîs, tría three
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“You have to stay positive. Think about how you’re going to make lots of friends,” said Juan Diego, a fan from Culver City who has been to eight World Cups and traveled this week to see El Tri play on Wednesday at La Corregidora, 240 miles from Guadalajara.
From Los Angeles Times
Tri Pointe Homes rallied 27% to $46.37 as Japan’s Sumitomo Forestry External link agreed to acquire the home builder for roughly $4.5 billion.
From Barron's
The TRI helps determine potential non-carcinogenic health risk from exposure to PTEs.
From Science Daily
A TRI below 1 indicates low risk.
From Science Daily
For most metals, TRI values were below 1, indicating no significant non-carcinogenic risk for adults consuming these foods from the Doce River estuary.
From Science Daily
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
