Karyocyte: Any cell that possesses a nucleus. A neuron (nerve cell) is a karyocyte; it has a nucleus. A mature erythrocyte (red blood cell) is not a karyocyte; it lacks a nucleus. The term 'karyocyte' is made up of 'kary-' from the Greek 'karyon' meaning 'nut or kernel' + '-cyte' from the Greek 'kytos' meaning a 'hollow vessel' = a hollow vessel (a... Found on http://www.medterms.com/script/main/art.asp?articlekey=11929