n. [ Xanthic + amide. ] (Chem.) An amido derivative of xanthic acid obtained as a white crystalline substance, C2H5O.CS.NH2; -- called also xanthogen amide. [ 1913 Webster ]
n. Any rare earth element of the lanthanide series (atomic numbers 57 through 71). Syn. -- rare earth, rare-earth element, lanthanon. [ WordNet 1.5 ]