dry mustard dry-mouthed • drynaria · · · Info · Definitions · Synonyms · Characters · · dry mustard · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) a substance such that one to three tablespoons dissolved in a glass of warm water is a homemade emetic. Synonyms: powdered mustard, dry mustard. · · Noun Definition 1 Synonyms · · · powdered mustard · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 m latin small letter m U+006D r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079