Etymology

metallothionein

M3E1T1A1L1L1O1T1H4I1O1N1E1I1N1

Today it means: Any of a family of cysteine-rich proteins that bond to heavy metals Full definition →

English thionein ← Ancient Greek μέτᾰλλον (métăllon)
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The story

  1. Ancient Greekμέτᾰλλον (métăllon)
  2. Englishmetallo-
  3. Englishthionein
  4. English todaymetallothionein

From metallo- + thionein.

Etymology from Wiktionary, CC BY-SA 4.0.