diopter noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced American Dictionary at OxfordLearnersDictionaries.com

Definition of diopter noun from the Oxford Advanced American Dictionary

diopter

noun

(Canadian English usually dioptre) noun

NAmE//daɪˈɑptər//

(physics)

a unit for measuring the power of a lens to refract light (= make it change direction)

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