thiosulfuric acid thi·o·sul·fu·ric acid (thī'ō-sŭl-fy&oobreve;r'ĭk)
n.
An acid formed by replacement of an oxygen atom by a sulfur atom in sulfuric acid, known only in solution or by its salts and esters.
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a fool or simpleton; ninny. |