colmascope

== English == === Etymology === Trademark name (see citations for discussion). === Noun === colmascope (plural colmascopes) An instrument for visualising stressed regions, especially internal regions, in substances such as glass, by detecting differences in the degree of rotation of the plane of polarisation, generally by placing the object between crossed polarizers. Stephen R. Wilk (2021), Sandbows and Black Lights‎[1], →ISBN, pages 47–: ==== See also ==== polariscope