n. [ Phosphorus + ammonia. ] (Chem.) An inert amorphous white powder,
n. (Chem.) A salt of sulphamic acid. [ 1913 Webster ]
a. (Chem.) Of or pertaining to a sulphamide; derived from, or related to, a sulphamide; specifically, designating an amido acid derivative,
n. (Chem.) Any one of a series of amido compounds obtained by treating sulphuryl chloride with various amines. [ 1913 Webster ]