I. tri-ˈpan transitive verb
( tre·panned ; tre·pan·ning )
Etymology: Middle English, from trepane trephine
Date: 15th century
1. : to use a trephine on (the skull)
2. : to remove a disk or cylindrical core (as from metal for testing)
• trep·a·na·tion ˌtre-pə-ˈnā-shən noun
II. ˈtrē-ˌpan, tri-ˈpan noun
Etymology: Middle English trepane trephine, Anglo-French trepan, from Medieval Latin trepanum, from Greek trypanon auger, from trypan to bore
Date: circa 1877
: a heavy tool used in boring mine shafts
III. tri-ˈpan noun
Etymology: origin unknown
Date: 1641
1. archaic : trickster
2. archaic : a deceptive device : snare
IV. tri-ˈpan transitive verb
( tre·panned ; tre·pan·ning )
Date: circa 1656
archaic : entrap , lure