/ Dictionary / Index S sexcentenary: Meaning and Definition of Find definitions for: sex•cen•ten•ar•y Pronunciation: (seks"sen-ten'u-rē, seks-sen'tn-er"ē or, esp. Brit. -sen-tē'nu-rē), [key] — adj., n., pl. -nar•ies. —adj. pertaining to 600 or a period of 600 years; marking the completion of 600 years. —n. a 600th anniversary or its celebration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sex cell sex change Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language