proptosis

noun
prop·​to·​sis | \präp-ˈtō-səs, prō-ˈtō- \

Definition of proptosis 

: forward projection or displacement especially of the eyeball

Examples of proptosis 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 'proptosis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of proptosis

1676, in the meaning defined above

History and Etymology for proptosis

New Latin, from Late Latin, falling forward, from Greek proptōsis, from propiptein to fall forward, from pro- forward + piptein to fall — more at pro-, feather

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Time Traveler for proptosis

The first known use of proptosis was in 1676

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More Definitions for proptosis

proptosis

noun
pro·​pto·​sis | \(ˈ)prō-ˈtō-səs, präp-ˈtō- \
plural proptoses\ -​ˌsēz \

Medical Definition of proptosis 

: forward projection or displacement especially of the eyeball

More from Merriam-Webster on proptosis

Britannica.com: Encyclopedia article about proptosis

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