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1. Not rigid: a nonrigid frame.
2. Of, relating to, or being a lighter-than-air aircraft that holds its shape by gas pressure.
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.


1. not rigid; flexible
2. (Aeronautics) (of the gas envelope of an airship) flexible and held in shape only by the internal gas pressure
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(nɒnˈrɪdʒ ɪd)

1. not rigid.
2. designating a type of airship having a flexible gas container without a supporting structure and held in shape only by the pressure of the gas within.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.nonrigid - designating an airship having a shape maintained only by internal gas pressure and without a supporting structure
aeronautics, astronautics - the theory and practice of navigation through air or space
rigid - designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Therefore, after PET and MRI registration, the resulting images were nonrigidly registered once more with MNI152 atlas (2 mm) using the open source software NiftyReg.
If we understand identity as a relation expressible only by proper names, and if we assume that proper names are rigid designators, characterized in Kripke's way, overlooking the fact that objects can also be nonrigidly designated with very different implications for K(Q-W), then it is logically uninteresting to conclude that identity is always necessary and never merely contingent.
However, since the PET volumes were physically coregistered to the ungated CT scan, they were deformed to the inhale phase using deformation vectors calculated by nonrigidly registering the ungated CT to the inhale CT volume using the symmetric log-domain diffeomorphic demons algorithm (ver.