Definition of diopter
English to English noun - a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists
source: WordNet 3.0 - An optical instrument, invented by Hipparchus, for taking altitudes, leveling, etc.
source: Webster 1913
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Nearby Word
diopter, dioptre, dioptry, diptera, doubter, diphtheria, devoter, deep water, deep-water, debater, divider, debtor, debitor, devotor, devotary, deviator, defeature, deputator, defiatory, deviatory
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