Etymology

tris-

Today it means: A variant of tri- used to indicate that the component that does not take the prefix occurs three times in the compound: trisphosphuret of copper is PCu₃; trisbenzeneazoresorcinol, C₆H(OH)₂(N₂Ph)₃. Full definition →

Ancient Greek τρῐ́ς
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The story

  1. Ancient Greek · borrowed fromτρῐ́ς“thrice”
  2. English todaytris-

Borrowed from Ancient Greek τρῐ́ς (trĭ́s, “thrice”).

Etymology from Wiktionary, CC BY-SA 4.0.