CEPHALOMETER

Etymology

Noun

cephalometer (plural cephalometers)

An instrument for measuring the head.

A device for positioning the head, and holding it steady, for an X-ray or surgery; a cephalostat.

Source: Wiktionary

Ceph`a*lom"e*ter, n. Etym: [Cephalo- + -meter.] (Med.)

Definition: An instrument measuring the dimensions of the head of a fetus during delivery.

Source: Webster’s Unabridged Dictionary 1913 Edition