Etymology

radioisotope

R1A1D2I1O1I1S1O1T1O1P3E1

Today it means: A radioactive isotope of an element. Full definition →

English isotope ← Latin radius
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The story

  1. Latinradius
  2. Englishradio-
  3. Englishisotope
  4. English todayradioisotope

From radio- + isotope.

Etymology from Wiktionary, CC BY-SA 4.0.