actinometer

A1C3T1I1N1O1M3E1T1E1R1

noun

An instrument used to measure the heating power of electromagnetic radiation, especially that of solar radiation.

Similar
heliothermometer
OriginAncient Greek μέτρον (métron) ← Proto-Indo-European *meh₁- ← English actino- →
Scrabble 15
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Meanings

nounactinometer (plural actinometers)

plural actinometers

  1. natural sciencesAn instrument used to measure the heating power of electromagnetic radiation, especially that of solar radiation.

    Synonyms: heliothermometer

Synonyms & antonyms

nounAn instrument used to measure the heating power of electromagnetic radiation, especially that of solar radiation.

Similar
heliothermometer
Also see
heliothermometer

Origin

  1. Ancient Greekᾰ̓κτῑ́ς (ăktī́s)
  2. Englishactino-
  3. Proto-Indo-European*med-
  4. Proto-Indo-European*meh₁-
  5. Ancient Greekμέτρον (métron)
  6. Englishactinometer

From actino- + -meter.

Full word history & related roots →

Translations

Bulgarian актинометър
  • актинометър (aktinometăr)measuring instrument
Catalan actinòmetre
  • actinòmetremeasuring instrument
Chinese Mandarin 光量計 /光量计, 露光計 /露光计
  • 光量計 /光量计 (guāngliàngjì)measuring instrument
  • 露光計 /露光计 (lùguāngjì)measuring instrument
  • 曝光計 /曝光计 (pùguāngjì)measuring instrument
Finnish aktinometri
  • aktinometrimeasuring instrument
French actinomètre
  • actinomètremeasuring instrument
Hungarian aktinométer
  • aktinométermeasuring instrument
Indonesian aktinometer
  • aktinometermeasuring instrument
Irish achtanaiméadar
  • achtanaiméadarmeasuring instrument
Italian attinometro
  • attinometromeasuring instrument
Malay aktinometer
  • aktinometermeasuring instrument
Polish aktynometr
  • aktynometrmeasuring instrument
Portuguese actinômetro, actinómetro
  • actinômetromeasuring instrument
  • actinómetromeasuring instrument
Romanian actinometru
  • actinometrumeasuring instrument
Russian актино́метр
  • актино́метр (aktinómetr)measuring instrument
Spanish actinómetro
  • actinómetromeasuring instrument
Tamil கதிர் செறிவு அளவி
  • கதிர் செறிவு அளவி (katir ceṟivu aḷavi)measuring instrument
Ukrainian актинометр
  • актинометр (aktynometr)measuring instrument

Rhymes & wordplay

Anagrams

interactomecoterminate
Cite this entry
APA

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

MLA

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

Chicago

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

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