e/Mesoionic

Information
has gloss	eng: Mesoionic chemical compounds are dipolar five- or six- membered heterocyclic compounds in which both the negative and the positive charges are delocalized. A completely uncharged structure cannot be written and mesoionic compounds cannot be represented satisfactorily by any one mesomeric structure.
lexicalization	eng: Mesoionic
instance of	(noun) a compound containing a heterocyclic ring heterocyclic compound, heterocycle, heterocyclic