Adjacent Words

tri- definitions

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Merriam Webster's

combining form Etymology: Latin (from tri-, tres) & Greek, from tri-, treis — more at three 1. three ; having three elements or parts <trigraph> 2. into three <trisect> 3. a. thrice <triweekly> b. every third <trimonthly>

Oxford Reference Dictionary

comb. form forming nouns and adjectives meaning: 1 three or three times. 2 Chem. (forming the names of compounds) containing three atoms or groups of a specified kind (triacetate). Etymology: L & Gk f. L tres, Gk treis three

Webster's 1913 Dictionary

Tri- Tri- [Gr. tri- or L. tri-, sometimes through French; akin to L. tres three, and E. three. See Three.] 1. A prefix meaning three, thrice, threefold; as in tricolored, tridentate. 2. (Chem.) A prefix (also used adjectively) denoting three proportional or combining part, or the third degree of that to the name of which it is prefixed; as in trisulphide, trioxide, trichloride.

Collin's Cobuild Dictionary

Tri- is used at the beginning of nouns and adjectives that have 'three' as part of their meaning. ...a tri-partite meeting... It was triangular in shape. PREFIX