Etymology

spectroradiometer

Today it means: A device that measures the spectral power distributions of illuminants, used to evaluate and categorize lighting or to calibrate display technology. Full definition →

English radiometer ← Latin spectrum ← Proto-Italic *spekjō
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The story

  1. Proto-Indo-European*speḱ-
  2. Proto-Indo-European*spéḱyeti
  3. Proto-Italic*spekjō
  4. Latinspeciō
  5. Latinspectrum
  6. Englishspectrum
  7. Englishspectro-
  8. Englishradiometer
  9. English todayspectroradiometer

From spectro- + radiometer.

Etymology from Wiktionary, CC BY-SA 4.0.