Etymology

pyridyl

P3Y4R1I1D2Y4L1

Today it means: Any of three isomeric univalent radicals, C₅H₄N-, derived from pyridine; analogous to phenyl. Full definition →

Ancient Greek ῡ̔́λη (hū́lē) ← Proto-Indo-European *swel-der.? ← English pyridine
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The story

  1. GermanPyridin
  2. Englishpyridine
  3. Proto-Indo-European*swel-der.?
  4. Ancient Greekῡ̔́λη (hū́lē)
  5. English todaypyridyl

From pyridine + -yl.

Etymology from Wiktionary, CC BY-SA 4.0.