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dioptre

/daɪˈɒptər/ /diˈɒptər/

Meanings
noun
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.

Examples :

"My new glasses have a power of -2 dioptres to correct my nearsightedness. "
medicine physics science technical unit

Related Words

Illustration examination

examination noun

/ɪɡˌzæmɪˈneɪʃən/

The act of examining.

"The examination of the patient's symptoms took several hours. "

Illustration reciprocal

reciprocal noun

/ɹɪˈsɪpɹək(ə)l/

The number obtained by dividing 1 by another given number; the result of exchanging the numerator and the denominator of a fraction.

"0.5 is the reciprocal of 2."

Illustration projections

projections noun

/prəˈdʒɛkʃənz/ /proʊˈdʒɛkʃənz/

Something which projects, protrudes, juts out, sticks out, or stands out.

"The face of the cliff had many projections that were big enough for birds to nest on."

Illustration theodolite

theodolite noun

/θiːˈɒdəlaɪt/

A surveying instrument, consisting of a small mounted telescope, used to measure horizontal and vertical angles.

"The construction workers used a theodolite to precisely measure the angles for the new building's foundation. "

Illustration instrument

instrument noun

/ˈɪnstɹəmənt/

A device used to produce music.

"The violinist was a master of her instrument."

Illustration correction

correction noun

/kəˈɹɛkʃən/

The act of correcting.

"The teacher made a correction to the student's spelling mistake. "

Illustration adjustment

adjustment noun

/əˈdʒʌst.mənt/

The action of adjusting something

"The adjustment to the new school schedule took a few days. "

Illustration binoculars

binoculars noun

/ˈbənˌɒk.jə.lə(ɹ)z/

A hand-held device consisting of a series of lenses and prisms, used to magnify objects so that they can be better seen from a distance, and looked at through both eyes.

"Using the binoculars, Sarah could clearly see the distant mountains from the schoolyard. "

Illustration populations

populations noun

/ˌpɑpjəˈleɪʃənz/ /ˌpɒpjəˈleɪʃənz/

The people living within a political or geographical boundary.

"The population of New Jersey will not stand for this!"

Illustration accurately

accurately adverb

/ˈæk.jə.ɹɪt.li/

In an accurate manner; exactly; precisely; without error or defect.

"The student answered the math questions accurately. "

Illustration anthropologist

anthropologist noun

/ˌæn.θɹoʊˈpɑl.ə.d͡ʒɪst/

One who is versed in anthropology.

"The anthropologist studied the ancient tools to learn about the daily lives of people long ago. "

Illustration foundation

foundation noun

/faʊnˈdeɪʃən/

The act of founding, fixing, establishing, or beginning to erect.

"The foundation of his institute has been wrought with difficulty."