Definition of tri- in English:

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tri-

Pronunciation: /trī/

combiningForm

1Three; having three: triathlon
1.1 Chemistry (In names of compounds) containing three atoms or groups of a specified kind: trichloroethane

Usage

See ter- (usage).

Origin

From Latin and Greek, from Latin tres, Greek treis 'three'.

For editors and proofreaders

Syllabification: tri-

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