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Interferometer and Spirometer

interferometer

noun

  • Any measuring instrument that uses interference patterns to make accurate measurements of waves. .
WordNet 3.0 © 2006 by Princeton University
(n.) An instrument for measuring small movements, distances or displacements by means of the interference of two beams of light; -- called also refractometer.
Webster's Revised Unabridged Dictionary
spirometer

noun

  • A measuring instrument for measuring the vital capacity of the lungs. .
WordNet 3.0 © 2006 by Princeton University
(n.) An instrument for measuring the vital capacity of the lungs or the volume of air which can be expelled from the chest after the deepest possible inspiration. Cf. Pneumatometer.
Webster's Revised Unabridged Dictionary
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