/ Dictionary / Index E exophthalmos: Meaning and Definition of Find definitions for: ex•oph•thal•mos Pronunciation: (ek"sof-thal'mus, -mos), [key] — n. Pathol. protrusion of the eyeball from the orbit, caused by disease, esp. hyperthyroidism, or injury. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: exophthalmos (Thesaurus) exophthalmic goiter exopodite Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language