a colorless gas, HI, having a suffocating odor: the anhydride of hydriodic acid.
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Origin of hydrogen iodide
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for hydrogen iodide
a colourless poisonous corrosive gas obtained by a catalysed reaction between hydrogen and iodine vapour: used in making iodides. Formula: HI
an aqueous solution of this gas; hydriodic acid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012