1. 
   annulene
   Mancude (i.e. having formally the maximum number of noncumulative double bonds) monocyclic hydrocarbon without side chains of the general formula C_nH_n (n is an even number) or C_nH_n+1 (n is an odd number). Note that in systematic nomenclature an annulene wi...
   Found op http://www.chem.qmul.ac.uk/iupac/gtpoc/A.html
   
   
2. 
   Annulene
   Annulenes are completely conjugated monocyclic hydrocarbons. They have the general formula CnHn (when n is an even number) or CnHn+1 (when n is an odd number). The IUPAC naming conventions are that annulenes with 7 or more carbon atoms are named as [n]annulene, where n is the number of carbon atoms...
   Found op http://en.wikipedia.org/wiki/Annulene
   
   
3. 
   annulene
   totally conjugated hydrocarbon
   Found op http://www.chemistry-dictionary.com/definition/annulene.php
   
   

Tip: double click on a word to show its meaning.