gastight

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
References in periodicals archive ?
Extrapallial fluid samples were taken during microsensor measurements using gastight glass syringes (Hamilton).
In addition, when used with the IP65 housings, they offer gastight connections that meet the needs found in hazardous and controlled production environments.
The super-soft gel cushion conforms to the patient's face to ensure a gastight fit that is more secure than the PVC cushion and has a lower profile on the face.
The latter is usually done by brief hot melting two sheets of packaging material together to form a gastight seal [3,4].
The internal standard solution (100 [micro]L) was added to the yuzu juice sample (diluted 100-fold; 1.9 mL) in a 20-mL gastight vial sealed with a septum.
The monomer [epsilon]-CL (100 g, 0.877 mol), initiator glycerol (0.45 g, 4.87 x 10~3 mol), and [Sn(Oct).sub.2] (1 mL, 0.1g/mL) were consecutively added via a gastight syringe under argon into the reaction vial.