so′dium cy′clamate,[Chem.]a white, crystalline, water-soluble powder, NaC6NH12SO3, that has been used as a sweetening agent: banned by the FDA in 1970. Also called so′dium cy•clo•hex•yl•sul′fa•mate(sī′klə hek′səl sul′fə māt′, sik′lə-)USA pronunciation.