refractometer
ref·rac·to·meter
noun
1.
measuring instrument for measuring the refractive index of a substance
Origin
From refract + -o- + -meter.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.