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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


(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.
References in periodicals archive ?
A testimony to Martin's wide-ranging interest, several encyclopaedias, as well as treatises on medicine, aerostatics and electricity, figure in the inventory.
* Applications (aerostatics, cryogenics, electronics and semiconductors, imaging and lighting, industrial, shielding, and others)
Petrov surveys the development of aviation from aerostatics (balloons), and even tethered kites, to the very first aircraft built and flown in Russia.