proptosis
Concise Oxford English Dictionary © 2008 Oxford University Press:
proptosis /prɒpˈtəʊsɪs/
▶noun Medicine protrusion or displacement of an eye or other body part.
– origin C17: via late L. from Gk proptōsis, from pro ‘before’ + piptein ‘to fall’.
'proptosis' also found in these Oxford entries:

