polariscope
noun
po·lar·i·scope pō-ˈler-ə-ˌskōp 
pō-ˈla-rə-ˌskōp
1
: an instrument for studying the properties of or examining substances in polarized light
2
: polarimeter sense 2
polariscopic
pō-ˌler-ə-ˈskä-pik
adjective pō-ˌla-rə-ˈskä-pik
Example Sentences
Recent Examples on the Web Looking through a polariscope to view rainbows of stress in clear tape's backing, and assemble a puzzle that appears clear to the naked eye. 
Greg Burnett, cleveland.com, 20 Apr. 2018
Greg Burnett, cleveland.com, 20 Apr. 2018 Word History
Etymology
International Scientific Vocabulary, from polarization
First Known Use
1829, in the meaning defined at sense 1
Medical Definition
polariscope
noun
po·lari·scope pō-ˈlar-ə-ˌskōp
1
: an instrument for studying the properties of or examining substances in polarized light
2
: polarimeter sense 2