/ Dictionary / Index A A.R.C.S.: Meaning and Definition of Find definitions for: A.R.C.S. Pronunciation: [key] Associate of the Royal College of Science. Associate of the Royal College of Surgeons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arcs (Thesaurus) arcosolium arc sec Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language