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diopter

di·op·ter
D d

Transcription

    • US Pronunciation
    • US IPA
    • UK Pronunciation
    • UK IPA
    • [dahy-op-ter]
    • /daɪˈɒp tər/
    • /daɪˈɔptə/
    • US Pronunciation
    • US IPA
    • [dahy-op-ter]
    • /daɪˈɒp tər/

Definitions of diopter word

  • noun diopter Optics. a unit of measure of the refractive power of a lens, having the dimension of the reciprocal of length and a unit equal to the reciprocal of one meter. Abbreviation: D. 1
  • noun diopter an instrument, invented by Hipparchus, to measure the apparent diameter of the sun or moon or to estimate the size or elevation of distant objects. 1
  • noun diopter A unit of refractive power that is equal to the reciprocal of the focal length (in meters) of a given lens. 1
  • noun diopter a unit of measure of the power of a lens, equal to the power of a lens with a focal length of one meter 0
  • noun 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. 0
  • noun diopter (Obsolete (No longer in use)) Any lens system, such as a telescope. 0

Information block about the term

Origin of diopter

First appearance:

before 1585
One of the 35% oldest English words
1585-95; < Latin dioptra < Greek: instrument for measuring height or levels, equivalent to di- di-3 + op- (for ópsesthai to see) + -tra noun suffix of means

Historical Comparancy

Parts of speech for Diopter

noun
adjective
verb
adverb
pronoun
preposition
conjunction
determiner
exclamation

diopter popularity

A common word. It’s meaning is known to most children of preschool age. About 71% of English native speakers know the meaning and use the word.
This word is included in each student's vocabulary. Most likely there is at least one movie with this word in the title.

diopter usage trend in Literature

This diagram is provided by Google Ngram Viewer

Top questions with diopter

  • what is a diopter?
  • what is diopter?
  • how to measure diopter of glasses?
  • what does a diopter do?
  • how to use a diopter sight?
  • what diopter do i need?
  • how to adjust diopter?
  • what is diopter adjustment control?
  • what is a diopter on a camera?
  • what is diopter adjustment?
  • how to use diopter sights?
  • what is a diopter lens?
  • what is the diopter adjustment control on a camera?
  • how to calculate diopter from prescription?
  • what does diopter mean?

See also

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