trepan, trephine
(noun) a surgical instrument used to remove sections of bone from the skull
trephine
(verb) operate on with a trephine
Source: WordNet® 3.1
trephine (plural trephines)
(medicine) A surgical instrument with a cylindrical blade used to remove a circular section of tissue, f.e. bone or cornea; a trepan.
• trepan (obsolete)
trephine (third-person singular simple present trephines, present participle trephining, simple past and past participle trephined)
(intransitive) To use a trephine during surgery.
(transitive) To perforate with a trephine.
• nephrite, prehnite, repineth, ripeneth
Source: Wiktionary
Tre*phine", n. Etym: [A dim. of 1st trepan: cf. F. tréphine.] (Surg.)
Definition: An instrument for trepanning, being an improvement on the trepan. It is a circular or cylindrical saw, with a handle like that of a gimlet, and a little sharp perforator called the center pin.
Tre*phine", v. t. [imp. & p. p. Trephined; p. pr. & vb. n. Trephining.]
Definition: To perforate with a trephine; to trepan.
Source: Webster’s Unabridged Dictionary 1913 Edition
1 June 2025
(verb) come back to the originator of an action with an undesired effect; “Your comments may backfire and cause you a lot of trouble”; “the political movie backlashed on the Democrats”
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