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Rarefaction   Listen
Rarefaction

noun
1.
A decrease in the density of something.






WordNet 3.0 © 2010 Princeton University








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"Rarefaction" Quotes from Famous Books



... so far as it is an accidental form, it is distinguishable only in respect of its subject, and in this way it has its proper increase, like other accidental forms, by way of intensity in its subject, for instance in things subject to rarefaction, as is proved in Phys. iv, 9. In like manner science, as a habit, has its quantity from its objects, and accordingly it increases by addition, when a man knows more things; and again, as an accidental form, it has a certain quantity through being in its subject, and in this way it increases ...
— Summa Theologica, Part II-II (Secunda Secundae) • Thomas Aquinas

... apparently, as polished steel, though thirty thousand miles across—that they are in reality vast circling currents of meteoritic particles or dust, through which run immense waves, condensation and rarefaction succeeding one another as in the undulations of sound. Yet, with all their inferential tumult, they may actually be as soundless as the depths of interstellar space, for Struve has shown that those spectacular rings possess no ...
— Pleasures of the telescope • Garrett Serviss

... the apparatus. The intensity of the luminous phenomena will naturally decrease with the number of the photophorous particles occupying the space. Accordingly in the experiments of Crookes, on continued rarefaction of the gas, a condition was reached where a display of light is no longer perceptible, or can be made visible merely by the aid of fluorescent bodies. A condition may also appear, as is shown by Crookes' experiment, with the metallic plate ...
— Scientific American Supplement, No. 288 - July 9, 1881 • Various



Words linked to "Rarefaction" :   rarefy, concentration



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