Definition of "nucleoplasm" [nu•cle•o•plasm]

• The protoplasm of a cell nucleus. Also called karyoplasm. (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 interior of the nucleus is filled with a gel-like liquid known as nucleoplasm."
• "Also present in the nucleoplasm are proteins known as polymerases, which pluck nucleotides from the soup as needed when copying DNA."
• "The variety of protoplasm contained in the nucleus is called the _nucleoplasm_."