/ Dictionary / Index Q quasi-stellar radio source: Meaning and Definition of Find definitions for: qua'si-stel'lar ra'dio source" Pronunciation: [key] — Astron. Astron. a quasar having detectable radio emission. Abbr.: QSS Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. quasi-stellar object quasquicentennial Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language