annulene

Noun

 * 1)  Any monocyclic hydrocarbon, of general formula CnHn (where n is even), or CnHn+1 (where n is odd).

Usage notes
If n is greater than 6 (benzene) they are named [n]annulene e.g. [9]annulene.

Translations

 * Finnish: annuleeni
 * Portuguese: anuleno
 * Spanish: anuleno