Category:Tri-

Tri-. Etym: [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.)

Defn: 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.