/ Dictionary / Index O opusculum: Meaning and Definition of Find definitions for: o•pus•cu•lum Pronunciation: (ō-pus'kyu-lum), [key] — pl. -la opuscule. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. opuscule -opy Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language