/ Dictionary / Index M microtremor: Meaning and Definition of Find definitions for: mi•cro•trem•or Pronunciation: (mī"krō-trem'ur), [key] — n. microearthquake. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. microtopography microtubule Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language