cyclic acid anhydrides (cyclic anhydrides)

Acid anhydrides derived by loss of water between two oxoacid functions RkE(=O)l(OH)m (l ≠ 0) (carboxylic, sulfonic, etc.) in the same molecule so as to close a ring. Oxo oxygen replacement analogues are included, e.g.
See: thioanhydrides
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1329