/ Dictionary / Index S supercilium: Meaning and Definition of Find definitions for: su•per•cil•i•um Pronunciation: (s"pur-sil'ē-um), [key] — pl. -cil•i•a the fillet above the cyma of a cornice. (on an Attic base) either of the fillets above and below the scotia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: supercilium (Thesaurus) supercilious supercity Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language