imidic acids

Compounds derived from oxoacidsRkE(=O)l(OH)m (l ≠ 0) by replacing =O by =NR; thus tautomers of amides. In organic chemistry an unspecified imidic acid is generally a carboximidic acid, RC(=NR)(OH) . E.g. RS(=NH)2(OH) a sulfonodiimidic acid.
See: imino acids
Source:
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1342