/ Dictionary / Index D dynameter: Meaning and Definition of Find definitions for: dy•nam•e•ter Pronunciation: (dī-nam'i-tur), [key] — n. Optics. an instrument for determining the magnifying power of telescopes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dyna- dynamic Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language