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 formsprop·tosed [prop-tohst] /ˈprɒp toʊst/, prop·tot·ic [prop-tot-ik] /prɒpˈtɒt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for proptosis

Historical Examples of proptosis

British Dictionary definitions for proptosis


noun plural -ses (-siːz)

pathol the forward displacement of an organ or part, such as the eyeballSee also exophthalmos Compare prolapse

Word Origin for proptosis

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

proptosis in Medicine



n. pl. prop•to•ses (-sēz)

Forward displacement of an organ, especially an eyeball.
Related formsprop•tot•ic (-tŏtĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.