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rarefaction |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Rarefaction \Rar`e*fac"tion\, n. [Cf. F. rar['e]faction. See {Rarefy}.] The act or process of rarefying; the state of being rarefied; -- opposed to condensation; as the rarefaction of air. From WordNet r 1.6 [wn]: rarefaction n : a decrease in the density of something "a sound wave causes periodic rarefactions in its medium"
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