dithionous acid
noun
di·thi·o·nous acid
\(ˈ)dī¦thīənəs-\
Definition of dithionous acid
: hydrosulfurous acid —used in the nomenclature adopted by the International Union of Pure and Applied Chemistry
From the M-W Editors
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Origin and Etymology of dithionous acid
di- + thion- + -ous
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