rarefaction(redirected from rarefactive)
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1. The condition of being rarefied.
a. A decrease in density and pressure in a medium, such as air, caused by the passage of a sound wave.
b. The region in which this occurs.
the act or process of making less dense or the state of being less dense
ˌrareˈfactional, ˌrarefiˈcational, ˌrareˈfactive adj
rar•e•fac•tion(ˌrɛər əˈfæk ʃən)
1. the act or process of rarefying.
2. the state of being rarefied.