Definition of tri- in English:

tri-

combining form

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

Origin

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

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Word of the day tortie
Pronunciation: ˈtôrtē
noun
a tortoiseshell cat