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1. (n.) diopter
a unit of measure of the refractive power of a lens, having the dimension of the reciprocal of length and a unit equal to the reciprocal of one meter.
Etymology: (1585–95; < L dioptra < Gk: instrument for measuring height or levels =di-di -3+op- (for ópsesthai to see) +-tra n. suffix of means)
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| Definition of 'diopter' |
Princeton's WordNet |
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1. (noun) diopter, dioptre
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
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| Definition of 'diopter' |
Webster Dictionary |
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1. (noun) diopter
alt. of Dioptra
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Definitions of diopter 
