8449gasTTen-USVocabulário Colaborativo em Artes e Arquitetura active approved gasSubstance in the gaseous state, the state of matter distinguished from the liquid and solid states by very low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container.

Source: AAT

http://vocab.getty.edu/page/aat/300015379

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