nucleoplasm

noun

nu·​cle·​o·​plasm ˈnü-klē-ə-ˌpla-zəm How to pronounce nucleoplasm (audio)
ˈnyü-
: the protoplasm of a nucleus
nucleoplasmic
ˈnü-klē-ə-ˈplaz-mik How to pronounce nucleoplasm (audio)
ˈnyü-
adjective

Word History

Etymology

International Scientific Vocabulary

First Known Use

1882, in the meaning defined above

Time Traveler
The first known use of nucleoplasm was in 1882

Rhymes for nucleoplasm

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Browse Nearby Words

nucleophilic
nucleoplasm
nucleoprotein
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Cite this Entry

“Nucleoplasm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nucleoplasm. Accessed 18 Jul. 2025.

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Kids Definition

nucleoplasm

noun
nu·​cleo·​plasm
ˈn(y)ü-klē-ə-ˌplaz-əm
: the fluidlike substance in the nucleus of a cell in which the nucleolus and chromatin are suspended

Medical Definition

nucleoplasm

noun
nu·​cleo·​plasm ˈn(y)ü-klē-ə-ˌplaz-əm How to pronounce nucleoplasm (audio)
: the protoplasm of a nucleus
especially : nuclear sap
nucleoplasmatic
ˌn(y)ü-klē-ō-ˌplaz-ˈmat-ik How to pronounce nucleoplasm (audio)
adjective
or nucleoplasmic
-klē-ə-ˈplaz-mik How to pronounce nucleoplasm (audio)

More from Merriam-Webster on nucleoplasm

Britannica.com: Encyclopedia article about nucleoplasm

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