Lacking substance or concreteness; tenuous or indefinite.(adjective)
Full of or containing gas; gassy.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "gaseous" in a sentence
"Specifically the H5N1 (SAa2,3Gal) receptors were found â€œon non-ciliated cuboidal cells at the junction between the respiratory bronchiole and alveolusâ€ and on â€œa substantial number of cells lining the alveolar wall. â€ (This describes the substance of the lung tissue involved in gaseous exchange.)"
"It also shows large isotope effects, since condenses to liquid at 4.2 K, while the more rare isotope remains in gaseous form down to 3.2 K. Helium was first liquefied by Heike Kamerlingh-Onnes in 1909."
"His first problem involved the study, by flow techniques, of free radicals produced in gaseous photochemical reactions."