/ Dictionary / Index S smooth endoplasmic reticulum: Meaning and Definition of Find definitions for: smooth' endoplas'mic retic'ulum. Pronunciation: [key] See under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. smoothen smooth-faced 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