DIOPTRE


Meaning of DIOPTRE in English

n. (US diopter) Optics a unit of refractive power of a lens, equal to the reciprocal of its focal length in metres.

[ F dioptre f. L dioptra f. Gk dioptra: see DIOPTRIC ]

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.