Etymology

eka-actinium

Today it means: unbiunium (element 121) Full definition →

English actinium ← French actinium ← Ancient Greek ᾰ̓κτῑ́ς (ăktī́s)
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The story

  1. Englisheka-
  2. Ancient Greekᾰ̓κτῑ́ς (ăktī́s)
  3. Frenchactino-
  4. Frenchactinium
  5. Englishactinium
  6. English todayeka-actinium

From eka- + actinium.

Etymology from Wiktionary, CC BY-SA 4.0.