[ ek-sof-thal-muh s, -mos ]
/ ˌɛk sɒfˈθæl məs, -mɒs /

noun Pathology.

protrusion of the eyeball from the orbit, caused by disease, especially hyperthyroidism, or injury.
Also ex·oph·thal·mus [ek-sof-thal-muh s] /ˌɛk sɒfˈθæl məs/, ex·oph·thal·mi·a [ek-sof-thal-mee-uh] /ˌɛk sɒfˈθæl mi ə/.

Origin of exophthalmos

1870–75; < New Latin < Greek exóphthalmos with prominent eyes, equivalent to ex- ex-3 + ophthalmós eye; see ophthalmic

OTHER WORDS FROM exophthalmos

ex·oph·thal·mic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for exophthalmic

British Dictionary definitions for exophthalmic


exophthalmus (ˌɛksɒfˈθælməs) or exophthalmia (ˌɛksɒfˈθælmɪə)

/ (ˌɛksɒfˈθælmɒs) /


abnormal protrusion of the eyeball, as caused by hyperthyroidismAlso called: proptosis, ocular proptosis

Derived forms of exophthalmos

exophthalmic, adjective

Word Origin for exophthalmos

C19: via New Latin from Greek, from ex- 1 + ophthalmos eye
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for exophthalmic (1 of 2)

[ ĕk′səf-thălmĭk ]


Of or relating to exophthalmos.
Marked by prominence of the eyeball.

Medical definitions for exophthalmic (2 of 2)

[ ĕk′səf-thălməs ]


Abnormal protrusion of the eyeball.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.