The Collaborative International Dictionary
Hydriodic acid
Hydriodic \Hy`dri*od"ic\, a. [Hydr- + iodic: cf. F. hydriodique.] (Chem.) Pertaining to, or derived from, hydrogen and iodine; -- said of an acid ( HI) produced by the combination of these elements.
Hydriodic acid (Chem.), a pungent, colorless gas, HI, usually prepared as a solution in water. It is strong reducing agent. Called also hydrogen iodide.
Wiktionary
hydriodic acid
n. (context chemistry English) a solution of hydrogen iodide, HI, in water; it is a strong acid and reducing agent
WordNet
hydriodic acid
n. (HI) a colorless or yellow aqueous solution of hydrogen iodide; "hydriodic acid is a strong acid"