Etymology

ypsiliform

Y4P3S1I1L1I1F4O1R1M3

Today it means: In the shape of the letter upsilon (Υ (U)). Full definition →

Latin fōrma ← English ypsilon
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The story

  1. Englishypsilon
  2. Latinfōrma
  3. English todayypsiliform

From ypsilon + -iform.

Etymology from Wiktionary, CC BY-SA 4.0.