nuclei
B2Academic, Scientific, Technical
Definition
Meaning
The plural form of 'nucleus', referring to the central and most important parts of objects or systems.
The central core of atoms (physics/chemistry); the central region of cells controlling growth and reproduction (biology); the core part of a group, organization, or idea; a central or focal point in a broader system.
Linguistics
Semantic Notes
"Nuclei" is inherently plural. The concept always implies centrality, control, or foundational importance. In scientific contexts, it's precise; in figurative use, it's more abstract, indicating essential cores.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning. Spelling conventions (e.g., -ise/-ize in related words) do not apply to 'nuclei'. Pronunciation differs slightly in the first vowel.
Connotations
Identical across both varieties. Strongly associated with science and academia.
Frequency
Equally common in technical/academic writing in both varieties. Rare in informal everyday speech.
Vocabulary
Collocations
Grammar
Valency Patterns
The nuclei of [plural noun] (e.g., The nuclei of atoms)Nuclei [verb] (e.g., Nuclei fuse)[Adjective] nuclei (e.g., Stable nuclei)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No common idioms specifically for 'nuclei'. Figurative use is literal, e.g., 'the nuclei of the movement']”
Usage
Context Usage
Business
Rare. Used figuratively: 'The nuclei of our innovation teams are based in London.'
Academic
Very Common. In physics, biology, chemistry, geology: 'The study focused on the behaviour of atomic nuclei.'
Everyday
Very Rare. Limited to discussions of science or highly figurative language: 'These small communities are the nuclei of the wider culture.'
Technical
Very Common. The standard term for the central parts of atoms, cells, crystals, storms, etc.
Examples
By Part of Speech
verb
British English
- The particles nucleate around existing impurities.
- The cells are nucleated centrally.
American English
- The particles nucleate around existing impurities.
- The cells are nucleated centrally.
adverb
British English
- The cells are nuclearly distinct.
- The material is nuclearly localised.
American English
- The cells are nuclearly distinct.
- The material is nuclearly localized.
adjective
British English
- The nuclear envelope surrounds the nucleus.
- Nuclear fission splits atomic nuclei.
American English
- The nuclear envelope surrounds the nucleus.
- Nuclear fission splits atomic nuclei.
Examples
By CEFR Level
- Under a microscope, you can see the nuclei in the cells.
- Atoms have tiny nuclei in the middle.
- The nuclei of these atoms are not stable and can decay.
- In biology class, we learned how nuclei control cell functions.
- The experiment demonstrated how heavy nuclei can be split in a process called fission.
- Several distinct nuclei of opinion began to form within the political party.
- Advanced imaging techniques allow us to observe the complex dynamics within atomic nuclei.
- The sociologist identified several small, ideologically pure nuclei from which the broader movement eventually grew.
Learning
Memory Aids
Mnemonic
Imagine NEW CLUE EYE (sounds like 'nuclei') looking through a microscope to see the central cores (nuclei) of many cells.
Conceptual Metaphor
CENTRE IS CONTROL (The nuclei control the cell); ESSENCE IS A CORE (The nuclei of the argument were hard to find).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'ядер' (of reactors, weapons) which is a broader, more political/military term. 'Nuclei' is more specific to science.
- The singular 'nucleus' is 'ядро'. Ensure subject-verb agreement: 'nuclei' is plural, requiring plural verbs (e.g., 'nuclei are', not 'nuclei is').
Common Mistakes
- Pronouncing it as /ˈnuː.kjuːl.aɪ/ (adding a 'y' sound).
- Using a singular verb with the plural 'nuclei' (Incorrect: 'The nuclei is stable.' Correct: 'The nuclei are stable.').
- Misspelling as 'nuculi' or 'nucleii'.
Practice
Quiz
Which of the following sentences uses 'nuclei' correctly?
FAQ
Frequently Asked Questions
No. The first syllable differs: British /ˈnjuː-/ (like 'new'), American /ˈnuː-/ (like 'noo'). The rest /kli.aɪ/ is the same.
The singular is 'nucleus'. 'Nuclei' is the standard Latin-derived plural. The anglicized plural 'nucleuses' is very rare and generally avoided in formal/scientific writing.
Yes, but it's formal and figurative. It describes the central or most important parts of non-physical things, like ideas or groups (e.g., 'the nuclei of the rebellion'). It is not common in casual conversation.
No, it is incorrect. 'Nuclei' is plural, so you cannot use the singular article 'a' with it. You must say 'a nucleus' for singular or 'the nuclei', 'two nuclei', etc. for plural.