/ Dictionary / Index T trimetallic: Meaning and Definition of Find definitions for: tri•me•tal•lic Pronunciation: (trī"mu-tal'ik), [key] — adj. of three metals. (of an offset plate) consisting of a face layer of chromium, stainless steel, or chemically prepared aluminum over a layer of copper with a strengthening backup layer of steel or other metal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trimester trimeter Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language