introscope

Noun

 * 1) An optical device similar to an endoscope, used in various industrial settings such as checking jet engines for cracks, observing nuclear reactors for cracks, or measuring the fat layer on a meat carcass.
 * 2) * 1962, New Scientist (volume 14, number 287, page 338)
 * The picture shows the introscope mounted on a valve over one of the charging holes of the fast reactor.
 * 1) * 1962, New Scientist (volume 14, number 287, page 338)
 * The picture shows the introscope mounted on a valve over one of the charging holes of the fast reactor.