Associations to the word «Rarefaction»

Wiktionary

RAREFACTION, noun. A reduction in the density of a material, especially that of a fluid

Dictionary definition

RAREFACTION, noun. A decrease in the density of something; "a sound wave causes periodic rarefactions in its medium".

Wise words

Every day we should hear at least one little song, read one good poem, see one exquisite picture, and, if possible, speak a few sensible words.
Johann Wolfgang Von Goethe