• synonyms


noun Pathology.
  1. the forward displacement of an organ.
  2. exophthalmos.
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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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for proptosis

Historical Examples of proptosis

  • Intra-orbital bleeding, subconjunctival hæmorrhage with proptosis and ecchymosis of the lids were usually well marked.

    Surgical Experiences in South Africa, 1899-1900

    George Henry Makins

  • Collapse of globe, proptosis, subconjunctival hæmorrhage, œdema and ecchymosis of lids.

  • Proptosis, subconjunctival hæmorrhage, ecchymosis of eyelids.

British Dictionary definitions for proptosis


noun plural -ses (-siːz)
  1. pathol the forward displacement of an organ or part, such as the eyeballSee also exophthalmos Compare prolapse
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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)
  1. Forward displacement of an organ, especially an eyeball.
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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.