TREPHINE

trephine. Trephine, n. an instrument, a samll trepan

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Tre‐phine″ (?; 277), n. [[A dim. of 1st trepan: cf. F. tréphine.]] (Surg.) 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.