n.
Pronunciation: ' tr ē - ˌ f ī n
Function: noun
Etymology: French tréphine, from obsolete English trefine, trafine, from Latin tres fines three ends, from tres three + fines, plural of finis end ― more at THREE
Date: 1628
: a surgical instrument for cutting out circular sections (as of bone or corneal tissue)
– trephine transitive verb