cyclo- 

https://doi.org/10.1351/goldbook.C01495
  1. A prefix used in names to designate a ring structure, usually italicized in inorganic, but not in organic nomenclature. Examples:
    Sources:
    Blue Book, p. 497 [Terms] [Book]
    Red Book, 3rd ed., p. 245 [Terms] [Book]
    See also:
    Blue Book Guide, p. 30 [Terms] [Book]
  2. The prefix for an elementary reaction or some part thereof indicating that the bonds undergoing primitive changes form part of a ring in the transition state of a pericyclic process.
    Source:
    PAC, 1989, 61, 23. (System for symbolic representation of reaction mechanisms (Recommendations 1988)) on page 34 [Terms] [Paper]
Citation: 'cyclo-' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.C01495 RIS BibTex EndNote
Div. IIIDiv. VIIIPDFTextXMLJSON
Last revised: February 24, 2014