rarefaction

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rar·e·fac·tion

 (râr′ə-făk′shən)
n.
1. The condition of being rarefied.
2.
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.

rar′e·fac′tive adj.

rarefaction

(ˌrɛərɪˈfækʃən) or

rarefication

n
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)

n.
1. the act or process of rarefying.
2. the state of being rarefied.
rar`e•fac′tion•al, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.rarefaction - a decrease in the density of something; "a sound wave causes periodic rarefactions in its medium"
concentration - increase in density
Translations
rarefação

rarefaction

[ˌrɛərɪˈfækʃən] Nrarefacción f

rarefaction

nDünne f; (fig)Exklusivität f
References in periodicals archive ?
Therefore, plasma system provides two types of potential structure known as rarefactive (dark) solitons or compressive (bright).
The change of the coefficient of nonlinear term A with different plasma parameters (non-extensive parameter q, positive dust temperatures ratio [[sigma].sub.p], and negative dust temperatures ratio [[sigma].sub.n]) shows that the existence of the two sorts of solitons (compressive and rarefactive) depends mainly on the values of these parameters.
For all the ranges of 1 < c < 5 and 0 < [alpha] < 1, the nonlinear coefficient A is negative, mean that in this range of variation only rarefactive solitons will be generated in dusty plasma, and it is not useful to continue our work for modified KP equation.
We will derive a new rarefactive solitary wave solution of (1) with the exponential law for the permeability.