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dioptre

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.03 sec.
dioptre US, diopter [daɪˈɒptə]
n
(Mathematics & Measurements / Units) a unit for measuring the refractive power of a lens: the reciprocal of the focal length of the lens expressed in metres
[from Latin dioptra optical instrument, from Greek, from dia- through + opsesthai to see]
dioptral  adj
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.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
diopter
unit, unit of measurement - any division of quantity accepted as a standard of measurement or exchange; "the dollar is the United States unit of currency"; "a unit of wheat is a bushel"; "change per unit volume"
Translations
dioptre, (US) diopter
n → Dioptrie f
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A rubber-coated body and eyecups, centre focusing wheel, dioptre adjustment, carry case, straps and cleaning cloth complete the finishing touches to a truly piece of equipment.
IRISH DAILY Mirror reader offer: ATTENTION OUTDOOR ENTHUSIASTS! - ... by The Mirror (London, England)
 
 
 
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