[noo-klee-uh-proh-teen, -tee-in, nyoo-]
noun Biochemistry.
  1. any of the class of conjugated proteins occurring in cells and consisting of a protein combined with a nucleic acid, essential for cell division and reproduction.

Origin of nucleoprotein

First recorded in 1905–10; nucleo- + protein Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for nucleoprotein


  1. a compound within a cell nucleus that consists of a protein bound to a nucleic acid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

nucleoprotein in Medicine


  1. Any of a group of substances found in the nuclei of all living cells and in viruses and composed of a protein and a nucleic acid.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.