nu·cle·o·pro·tein 
(n′klē-ō-prōtēn′, -prōtē-ĭn, ny′-)
(n′klē-ō-prōtēn′, -prōtē-ĭn, ny′-)n.
Any of a group of complexes composed of protein and nucleic acid and found in the nuclei and cytoplasm of all living cells, as in chromatin and ribosomes, and in viruses.