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How to say: dioptre

Spelling: Dioptre Syllables  dioptre
US accent
/dɪˈɑːptɚ/
UK accent
/dɪˈɒptə/
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Definition

Definition — 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

Cross intents

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