Source : Webster's Revised Unabridged Dictionary (1913)

Sulphamic \Sulph*am"ic\, a. (Chem.)
   Of or pertaining to a sulphamide; derived from, or related
   to, a sulphamide; specifically, designating an amido acid
   derivative, {NH2.SO2.OH}, of sulphuric acid (analogous to
   sulphonic acid) which is not known in the free state, but is
   known in its salts.