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also ex·oph·thal·mus  (ĕk′səf-thăl′məs)
Abnormal protrusion of the eyeball.

[From Greek exophthalmos, with prominent eyes : ex-, outside; see exo- + ophthalmos, eye; see okw- in Indo-European roots.]

ex′oph·thal′mic adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌɛksɒfˈθælmɒs) ,




(Pathology) abnormal protrusion of the eyeball, as caused by hyperthyroidism. Also called: proptosis or ocular proptosis
[C19: via New Latin from Greek, from ex-1 + ophthalmos eye]
ˌexophˈthalmic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


or ex•oph•thal•mus

(ˌɛk sɒfˈθæl məs)

also ex`oph•thal′mi•a,

protrusion of the eyeball from the orbit, caused by disease or injury.
[1870–75; < New Latin < Greek exóphthalmos with prominent eyes =ex- ex-3 + ophthalmós eye]
ex`oph•thal′mic, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.exophthalmos - protrusion of the eyeball from the socket
hyperthyroidism, thyrotoxicosis - an overactive thyroid gland; pathologically excessive production of thyroid hormones or the condition resulting from excessive production of thyroid hormones
exophthalmic goiter, Graves' disease - exophthalmos occurring in association with goiter; hyperthyroidism with protrusion of the eyeballs
symptom - (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease
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