English edit

Etymology edit

From Middle French raréfaction.

Verb edit

rarefact (third-person singular simple present rarefacts, present participle rarefacting, simple past and past participle rarefacted)

  1. (transitive, intransitive) To reduce in density.
    • 2013, Beth Schrope, Surgical and Interventional Ultrasound[1]:
      As the ultrasound wave compresses and rarefacts through the medium, it causes microbubbles in the tissue to contract and expand.

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