Etymology

thiouracil

T1H4I1O1U1R1A1C3I1L1

Today it means: Any of a class of heterocycles based on 2-thioxo-1H-pyrimidin-4-one; the parent compound interferes with the synthesis of thyroxine and is used in the treatment of hyperthyroidism Full definition →

English uracil ← Ancient Greek θεῖον (theîon) ← Proto-Indo-European *dʰewh₂-der.?
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The story

  1. Proto-Indo-European*dʰewh₂-der.?
  2. Ancient Greekθέειον (théeion)
  3. Ancient Greekθεῖον (theîon)
  4. Englishthio-
  5. Englishuracil
  6. English todaythiouracil

From thio- + uracil.

Etymology from Wiktionary, CC BY-SA 4.0.