The meaning of Trephined and additional information.

Trephine(n.) 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.

Trephine(v. t.) To perforate with a trephine; to trepan.

Trephined(imp. & p. p.) of Trephine