Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun diopter

1 sense of diopter

Sense 1
diopter, 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)
       => unit of measurement, unit -- (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")