Etymology

isochron

I1S1O1C3H4R1O1N1

Today it means: A line on a chart linking rock of the same age (as determined from isotope ratios). Full definition →

English chron ← Ancient Greek ῐ̓́σος (ĭ́sos)
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The story

  1. Ancient Greekῐ̓́σος (ĭ́sos)
  2. Englishiso-
  3. Englishchron
  4. English todayisochron

From iso- + chron.

Etymology from Wiktionary, CC BY-SA 4.0.