Definition of Dioptre

Noun: dioptre  dI'óp-tu(r)
Usage: Brit, Cdn (US: diopter)

1. 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
   - diopter

See also:
dioptral
dioptres

Anagrams containing the word dioptre

doptire edioptr rediopt trediop ptredio optredi ioptred