dioptra (0 synonym found)

We don't have any synonyms for dioptra yet.

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dioptre  ยท  dioptry

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Definition of dioptra:

(n) : Alternative form of diopter. [A unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters. Myopia is diagnosed and measured in diopters.]
Definition of dioptra:

(n) : Alternative form of diopter. [A unit of measure of the power of a lens or mirror, equal to the reciprocal of its focal length in meters. Myopia is diagnosed and measured in diopters.]
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