refractometer
An optical instrument used to measure the refractive index of a substance.
Noun
- An optical instrument used to measure the refractive index of a substance.
Origin
Etymology tree English refract Ancient Greek -ο- (-o-)der. Latin -o-bor. English -o- Proto-Indo-European *meh₁- Proto-Indo-European *-tḗr Proto-Indo-European *-trom Proto-Hellenic *-tron Ancient Greek -τρον (-tron) Ancient Greek μέτρον (métron)der. English -meter English refractometer From refract + -o- + -meter.