anionic

Webster's Dictionary (1913)

1. having the character of an anion; negatively charged; containing anions; — of atoms, molecules, and groups of atoms. Contrasted with cationic.

2. of or pertaining to anions. Contrasted with cationic

1. a class of synthetic detergents in which the molecules do not ionize in aqueous solutions. Syn. — anionic detergent, non-ionic detergent

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54 · with additions: GCIDE editors, WordNet 1.5