/ Dictionary / Index M metr-: Meaning and Definition of Find definitions for: metr- Pronunciation: [key] var. of before a vowel: metralgia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. metoprolol metralgia Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language