- biting, cutting, caustic, or sarcastic: said of speech, wit, etc.
- causing corrosion
- acting as a mordant
Origin of mordantMiddle English mordent from Old French mordant, present participle of mordre, to bite from Classical Latin mordere from Indo-European an unverified form merd-, variant, variety of base an unverified form mer-: see morbid
- a substance used in dyeing to fix the coloring matter, as a metallic compound that combines with the organic dye to form an insoluble colored compound, or lake, in the fiber of the fabric
- an acid or other corrosive substance used in etching to bite lines, areas, etc. into the surface