- trepan, trephine - a surgical instrument used to remove sections of bone from the skull
--1 is a kind of surgical instrument
Derived form: verb trepan1 - trepan - a drill for cutting circular holes around a center
--2 is a kind of drill
Derived form: verb trepan1
- trepan - cut a hole with a trepan, as in surgery
--1 is one way to bore, drill
Sample sentences:Derived forms: noun trepan2, noun trepan1
Somebody ----s something
Something ----s something