noun Pathology.
the forward displacement of an organ.

1670–80; < Neo-Latin < Greek próptōsis a fall forward. See pro-2, ptosis

proptosed [prop-tohst] , proptotic [prop-tot-ik] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
proptosis (prɒpˈtəʊsɪs)
n , pl -ses
pathol See also exophthalmos Compare prolapse the forward displacement of an organ or part, such as the eyeball
[C17: via Late Latin from Greek, from propiptein to fall forwards]

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American Heritage
Medical Dictionary

proptosis prop·to·sis (prŏp-tō'sĭs)
n. pl. prop·to·ses (-sēz)
Forward displacement of an organ, especially an eyeball.

prop·tot·ic (-tŏt'ĭk) adj.
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