ex·​oph·​thal·​mos | \ˌek-säf-ˈthal-məs, -səf-, -säp-\
variants: or less commonly exophthalmus

Definition of exophthalmos 

: abnormal protrusion of the eyeball

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Other Words from exophthalmos

exophthalmic \ˌek-​säf-​ˈthal-​mik, -​səf-​, -​säp-​ \ adjective

Examples of exophthalmos in a Sentence

Recent Examples on the Web

Bulging or protruding eyes (proptosis or exophthalmos) can be a sign of Graves disease, a disorder causing overactivity of the thyroid gland (hyperthyroidism). Claire Gillespie, SELF, "5 Reasons to Get Your Eyes Checked That Have Nothing to Do With Your Vision," 19 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'exophthalmos.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of exophthalmos

1872, in the meaning defined above

History and Etymology for exophthalmos

New Latin, from Greek exophthalmos having prominent eyes, from ex out + ophthalmos eye; akin to Greek ōps eye — more at eye

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Time Traveler for exophthalmos

The first known use of exophthalmos was in 1872

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More Definitions for exophthalmos


variants: also exophthalmus \ˌek-​säf-​ˈthal-​məs, -​səf-​ \

Medical Definition of exophthalmos 

: abnormal protrusion of the eyeball

Other Words from exophthalmos

exophthalmic \ˌek-​säf-​ˈthal-​mik \ adjective

More from Merriam-Webster on exophthalmos

Britannica.com: Encyclopedia article about exophthalmos

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living or existing for a long time

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