/ Dictionary / Index S sclerous: Meaning and Definition of Find definitions for: scle•rous Pronunciation: (sklēr'us, skler'-), [key] — adj. hard; firm; bony. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sclerotomy Sc.M. 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