/ Dictionary / Index S serotonergic: Meaning and Definition of Find definitions for: se•ro•to•ner•gic Pronunciation: (ser'u-tn-ûr'jik), [key] — adj. containing or activated by serotonin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. serotine serotonin Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language