Etymology

spectrohelioscope

Today it means: An instrument used for observing solar radiation. Full definition →

English helioscope ← Latin spectrum
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The story

  1. Latinspeciō
  2. Latinspectrum
  3. Englishspectrum
  4. Englishspectro-
  5. Englishhelioscope
  6. English todayspectrohelioscope

From spectro- + helioscope.

Etymology from Wiktionary, CC BY-SA 4.0.