Definition of "nucleosome" []

• Any of the repeating subunits of chromatin, consisting of a DNA chain coiled around a core of histones. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The molecules that compact DNA are called the nucleosome core particles."
• "[58] The histones form a disk-shaped complex called a nucleosome which has two complete turns of double-stranded DNA wrapped around it."
• "The resulting DNA/Histone complex, called a nucleosome subunit, is repeated tens of millions of times across the human genome to form chromatin, which is further compacted into ordered fibers 250-300 Angstroms in diameter (Refs 1-4)."