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English dictionary
Hint: Asterisk (*) is a wildcard. Asterisk substitutes zero or more characters.
English
noun
:
rarefaction
1.
rarefaction
(event)
a decrease in the density of something
Samples
A sound wave causes periodic rarefactions in its medium.
Broader (hypernym)
concentration
Based on WordNet 3.0 copyright © Princeton University.
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. English edition:
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.
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