catopter

A reflecting optical glass or instrument; a mirror.

My Cat whose black fur was so glossy and fine Her use of Catharon one well could divine. Almost indeed a Cat'''opter she showed.

For example, at research of an interference electromagnetic field near to a catopter on the metered reflectivity it is possible to define a permittivity and width of a dielectric slice.

A unit of measure of the converging power of a curved mirror, equal to the reciprocal of the focal length in meters; a diopter applied to a curved reflective surface as opposed to a lens.

This focus divided into 40", gives the catopters.

A catopter mirror will reflect parallel rays of light to a focus at a distance of one meter or 40 inches.

An Ancient Greek anal dilator or speculum.

Hippocrates (B.C. 432) described an instrument, the catopter, which was undoubtedly used as an anal speculum,

In the course of excavations undertaken in Pompei, such catopters had been found in "the house of surgeons".