n. [ See Ammonia. ] (Chem.) A compound radical,
[ 1913 Webster ]
n. [ Mercuric + ammonium. ] (Chem.) A radical regarded as derived from ammonium by the substitution of mercury for a portion of the hydrogen. [ 1913 Webster ]
n. [ Metal + ammonium. ] (Chem.) A hypothetical radical derived from ammonium by the substitution of metallic atoms in place of hydrogen. [ 1913 Webster ]
a. (Chem.) Pertaining to, derived from, or containing, rhodium and ammonia; -- said of certain complex compounds. [ 1913 Webster ]