dry mustard is a noun meaning "a substance such that one to three tablespoons dissolved in a glass of warm water is a homemade emetic". It carries one recorded sense.
a substance such that one to three tablespoons dissolved in a glass of warm water is a homemade emetic
Definitions, synonyms and semantic relations for dry mustard come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.