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n. (used with a sing. verb)
The science of gases in equilibrium and of the equilibrium of balloons or aircraft under changing atmospheric flight conditions.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
n (functioning as singular)
1. (General Physics) the study of gases in equilibrium and bodies held in equilibrium in gases. Compare aerodynamics
2. (Aeronautics) the study of lighter-than-air craft, such as balloons
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
aer•o•stat•ics(ˌɛər əˈstæt ɪks)
n. (used with a sing. v.)
1. the science that deals with gases in equilibrium.
2. the science of lighter-than-air aircraft.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
the study of the construction and operation of aerostats, lighter-than-air craft, as balloons or dirigibles. — aerostatic, aerostatical, adj.See also: Aviation
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.