/ Dictionary / Index O Orbiting Astronomical Observatory: Meaning and Definition of Find definitions for: Or'biting Astronom'ical Observ'atory. Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. orbiter Orbiting Geophysical Observatory Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language