A state of matter in which the material is compressible, has a low density and viscosity, can expand or contract greatly in response to changes in temperature and pressure, and readily and uniformly distributes itself throughout any container
John R. Cashman, Emergency Response to Chemical and Biological Agents, Glossary, ISBN 1-56670-355-7, Lewis Publishers, CRC Press LLCU, USA 2000. https://books.google.com.kw/books?id=i0lCG8f_6T8C& pg=PA319&lpg=PA319&dq=Fog+%26+Mist+Emergencies+Glo ssary&source=bl&ots=65he7jtVb3&sig=eihli-g4gRSarGm f6usuIOCuksQ&hl=en&sa=X&ei=odQOVZWKDcv3auXvgKgD&ve d=0CDUQ6AEwBA#v=onepage&q=Fog%20%26%20Mist%20Emerg encies%20Glossary&f=false, (Chem&BiolEmr - Amer) {973}