Etymology

rarefaction

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Today it means: A reduction in the density of a material, especially that of a fluid. Full definition →

Middle French raréfaction
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The story

  1. Middle French · derived fromraréfaction
  2. English todayrarefaction

From Middle French raréfaction. By surface analysis, rarefy + -faction.

Words from the same roots

Middle Frenchraréfaction all →

rarefact

Etymology from Wiktionary, CC BY-SA 4.0.