/ Dictionary / Index A astrometric binary: Meaning and Definition of Find definitions for: as'tromet'ric bi'nary Pronunciation: [key] — Astron. Astron. a binary star that can be recognized as such because of its undulating proper motion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. astrometeorology astrometry Related Content Daily Word Quiz: boorish Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language