Interferometer

noun

Definitions

Noun
  1. 1
    Any of several instruments that use the interference of waves to determine wavelengths and wave velocities, determine refractive indices, measure small distances, temperature changes, stresses, and many other useful measurements.
  2. 2
    any measuring instrument that uses interference patterns to make accurate measurements of waves wordnet

Etymology

From interfer(e) + -o- + -meter.

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