gas·tight

(găs′tīt′)

adj.

Impermeable by gas.

gas′tight′ness n.

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.

gastight

(ˈɡæsˌtaɪt)

adj

(General Physics) not allowing gas to enter or escape

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

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