Meaning of powdering tub in English:
powdering tub
Pronunciation /ˈpaʊd(ə)rɪŋ ˌtʌb/
noun
historical A tub in which meat, fish, etc., is salted and pickled.
Origin
Mid 16th century; earliest use found in John Palsgrave (d. 1554), teacher and scholar of languages. From powdering + tub.