Bible Dictionaries
Sinapism

Webster's Dictionary

(n.) A plaster or poultice composed principally of powdered mustard seed, or containing the volatile oil of mustard seed. It is a powerful irritant.

Bibliography Information
Webster, Noah. Entry for 'Sinapism'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/sinapism.html. 1828.