κεφαλοτρύπανον
From LSJ
ἐγώ εἰμι τὸ φῶς τοῦ κόσμου· ὁ ἀκολουθῶν μοι οὐ μὴ περιπατήσῃ ἐν τῇ σκοτίᾳ ἀλλ' ἕξει τὸ φῶς τῆς ζωῆς → I am the light of the world; he that followeth me shall not walk in darkness but shall have the light of life (John 8:12)
English (LSJ)
[ῡ], τό,
A trepan, Gal.14.785.
German (Pape)
[Seite 1428] τό, Schädelbohrer, Galen.
Greek (Liddell-Scott)
κεφᾰλοτρύπᾰνον: τό, τρυπάνιον, Γαλην. 2. 399.