hydrogen iodide

noun

1. a colorless gas, HI, having a suffocating odor: the anhydride of hydriodic acid.

hydrogen iodide

noun

1. a colourless poisonous corrosive gas obtained by a catalysed reaction between hydrogen and iodine vapour: used in making iodides. Formula: HI
2. an aqueous solution of this gas; hydriodic acid

Word History and Origins

Origin of hydrogen iodide¹

First recorded in 1895–1900