/ Dictionary / Index S sclera: Meaning and Definition of Find definitions for: scle•ra Pronunciation: (sklēr'u), [key] — n. Anat. a dense, white, fibrous membrane that, with the cornea, forms the external covering of the eyeball. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sclera (Thesaurus) scler- scleral Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language