exophthalmyn.
Origin: Either (i) a variant or alteration of another lexical item. Or (ii) a borrowing from Latin. Etymons: exophthalmia n.; Latin exophthalmia.
Etymology: < exophthalmia n. or its etymon post-classical Latin exophthalmia; compare -y suffix3.Previous versions of the OED give the stress as: exophˈthalmy.
1706 in (new ed.) ; whence in mod. Dicts.
This entry has not yet been fully updated (first published 1894; most recently modified version published online March 2021).