noun. An ion that has a positively charged carbon atom.

noun. any cation containing an excess positive charge on one or more carbon atoms

"A. Olah from the University of Southern California was awarded the Nobel Prize for Chemistry in 1994 "for his contributions to carbocation chemistry"."

carbenium ion  carbonium ion  radical ion  

bridged carbocation  

adduct  amines  anion  anionic  bridged