photometer

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US/fəˈtɑmɪtɚ/US/ˈfoʊtoʊˌmitɚ/UK/fəˈtɒmɪtə(ɹ)/UK/ˈfəʊtəʊˌmiːtə(ɹ)/

noun

Any of several instruments used to measure various aspects of the intensity of light.

Similar
light meterexposure meter
OriginAncient Greek μέτρον (métron) ← Proto-Indo-European *meh₁- ← English photo- →
UncommonScrabble 17
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Meanings

nounphotometer (plural photometers)

plural photometers

  1. natural sciencesAny of several instruments used to measure various aspects of the intensity of light.
verbphotometer (third-person singular simple present photometers, present participle photometering, simple past and past participle photometered)

present singular third person photometers · participle present photometering · participle past photometered · past photometered

  1. astronomyTo measure some aspect of light (from a star) using a photometer.

Synonyms & antonyms

nounphotographic equipment that measures the intensity of light

Similar
light meterexposure meter
Broader
photographic equipment
Also see
exposure meterilluminometerlight meter

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*bʰeh₂-
  2. Proto-Indo-European*bʰéh₂os
  3. Proto-Hellenic*pʰáwos
  4. Ancient Greekφᾰ́ος (phắos)
  5. Ancient Greekφῶς (phôs)
  6. Ancient Greekφωτο- (phōto-)
  7. Englishphoto-
  8. Proto-Indo-European*med-
  9. Proto-Indo-European*meh₁-
  10. Ancient Greekμέτρον (métron)
  11. Englishphotometer

From photo- + -meter.

Full word history & related roots →

Translations

Bengali ফটোমিটার
  • ফটোমিটার (phoṭōmiṭar)measuring instrument
Brazilian Portuguese fotômetro
  • fotômetromeasuring instrument
Catalan fotòmetre
  • fotòmetremeasuring instrument
Chinese Mandarin 光度計 /光度计
  • 光度計 /光度计 (guāngdùjì)measuring instrument
European Portuguese fotómetro
  • fotómetromeasuring instrument
Finnish fotometri
  • fotometrimeasuring instrument
French photomètre
  • photomètremeasuring instrument
German Luminometer
  • Luminometermeasuring instrument
Irish fótaiméadar
  • fótaiméadarmeasuring instrument
Italian fotometro
  • fotometromeasuring instrument
Japanese 光度計
  • 光度計 (kōdokei)measuring instrument
Malay jangka cahaya, fotometer
  • jangka cahayameasuring instrument
  • fotometermeasuring instrument
Persian نورسنج
  • نورسنجmeasuring instrument
Polish fotometr
  • fotometrmeasuring instrument
Romanian fotometru
  • fotometrumeasuring instrument
Russian фото́метр
  • фото́метр (fotómetr)measuring instrument
Spanish fotómetro
  • fotómetromeasuring instrument
Tagalog sugasukod
  • sugasukodmeasuring instrument

Rhymes & wordplay

Rhymes with photometer

petermeterheatermetrethermometereaterbarometerspectrometertweeterkilometrecheatermagnetometerbeaterspeedometerpotentiometerspectrophotometerhygrometerhydrometersphygmomanometerpyrometercytometerbolometerspirometernanometre
All rhymes →

Anagrams

prototheme
Cite this entry
APA

photometer. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/photometer

MLA

“photometer.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/photometer. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “photometer,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/photometer.

Source: photometer on Wiktionary, CC BY-SA 4.0.