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Definition of proptosis


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prop·to·sis  audio  (prp-tss) KEY 

NOUN:
pl. prop·to·ses  (-sz) KEY 
Forward displacement of an organ, especially an eyeball.

ETYMOLOGY:
Late Latin proptsis, prolapse, from Greek, from propiptein, propt-, to fall forward : pro-, forward ; see pro-2 + piptein, to fall; see pet- in Indo-European roots


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