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rarefaction

noun

rar·​e·​fac·​tion ˌrer-ə-ˈfak-shən How to pronounce rarefaction (audio)
1
: the action or process of rarefying
2
: the quality or state of being rarefied
3
: a state or region of minimum pressure in a medium traversed by compressional waves (such as sound waves)
rarefactional adjective

Example Sentences

Recent Examples on the Web For rarity, for sheer automotive rarefaction, the flagship of BMW’s 2 billion-euro i Division makes those cars look like link sausage. Dan Neil, WSJ, 31 Aug. 2017 Here is art that turns confectionery into both rarefaction and panache. Alastair Macaulay, New York Times, 19 May 2017

Word History

Etymology

French or Medieval Latin; French raréfaction, from Medieval Latin rarefaction-, rarefactio, from Latin rarefacere to rarefy

First Known Use

1572, in the meaning defined at sense 1

Time Traveler
The first known use of rarefaction was in 1572

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