Advertisement

Advertisement

dioptre

/ daɪˈɒptə /

noun

  1. a unit for measuring the refractive power of a lens: the reciprocal of the focal length of the lens expressed in metres


Discover More

Derived Forms

  • diˈoptral, adjective

Discover More

Word History and Origins

Origin of dioptre1

C16: from Latin dioptra optical instrument, from Greek, from dia- through + opsesthai to see

Advertisement

Advertisement

Advertisement

Advertisement


dioptometerdioptric