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[prop-toh-sis] /prɒpˈtoʊ sɪs/
noun, Pathology.
the forward displacement of an organ.
Origin of proptosis
1670-80; < New Latin < Greek próptōsis a fall forward. See pro-2, ptosis
Related forms
[prop-tohst] /ˈprɒp toʊst/ (Show IPA),
[prop-tot-ik] /prɒpˈtɒt ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for proptosis


noun (pl) -ses (-siːz)
(pathol) the forward displacement of an organ or part, such as the eyeball See also exophthalmos Compare prolapse
Word Origin
C17: via Late Latin from Greek, from propiptein to fall forwards
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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proptosis in Medicine

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.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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