Bible Dictionaries
Trephine

Webster's Dictionary

(1):

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

(2):

(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.

Bibliography Information
Webster, Noah. Entry for 'Trephine'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/trephine.html. 1828.