proptosis

noun

prop·​to·​sis präp-ˈtō-səs  prō-ˈtō- 

: 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, 19 Oct. 2017

Word History

Etymology

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

First Known Use

1676, in the meaning defined above

Medical Definition

proptosis

noun

pro·​pto·​sis (ˈ)prō-ˈtō-səs  präp-ˈtō- 

plural proptoses -ˌsēz 

: forward projection or displacement especially of the eyeball