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Dioptre
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noun
Dioptre
n. (Optics) A unit employed by oculists in numbering glasses according to the metric system; a refractive power equal to that of a glass whose principal focal distance is one meter.
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Etymology of 'Dioptre'
Collaborative International Dictionary of English 0.48
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Words linked to "Dioptre" :
unit of measurement
,
diopter
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