A term abandoned because of its ambiguous use to mean either RS(=O)=NH2 (sulfonimidamide) or RS(=NH)2=NH2 (sulfonodiimidamide).
Source: PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1369 [Terms] [Paper]