nucleus - Master This Word
Master this word with our 5-step learning method – Learn English in English
nucleus Word Meanings
- the central and most important part of an object, movement, or group
- in biology, a positively charged core of an atom or a cell that contains genetic material
- a small, dense region in the center of a larger object or structure
nucleus Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
nucleus Phonetic & Pronunciation
UK
/ˈnjuːklɪəs/
US
/ˈnuːkliəs/
nucleus Word Etymology
From Latin 'nucleus' meaning 'kernel, seed', which reflects the idea of being the central part of something. Visualize a small seed at the center of a fruit, surrounded by flesh, emphasizing its importance.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputReal Context
Nucleus refers to the central and most important part of something, and it appears in many contexts beyond science. It can describe a physical center, a core idea, or the essential region at the heart of a structure. In biology, the nucleus is a membrane-bound organelle that contains genetic material. In physics and chemistry, the nucleus is the positively charged center of an atom made of protons and neutrons. The phrase 'nucleus of a group' or 'nucleus of a movement' uses metaphor to mean the heart or core members. Learners should note the difference between 'nucleus' and related words like 'core' or 'centre', and be mindful of pronunciation NU-cle-us with the stress on the first syllable.
Usage Reminders
- - Learn the core meaning: the center or most important part.
- - Distinguish literal senses (atomic nucleus, cell nucleus) from metaphorical uses.
- - Don’t confuse nucleus with nuclear; 'nuclear' relates to energy or weapons.
- - Use the definite article: the nucleus of the atom, the nucleus of the cell.
- - Practice with biology, physics, and everyday phrases about groups or ideas.
- - Check pronunciation: NU-cle-us, stress on the first syllable.
Common Misconceptions
- Thinking nucleus only means 'the center' in everyday language, ignoring its scientific senses.
- Assuming all uses refer to atoms; biology and metaphorical uses are common too.
- Confusing the nucleolus with the nucleus; they are different parts inside a cell.
- Mistaking 'nuclear' for 'nucleus' in phrases related to energy or weapons.
- Overgeneralizing 'nucleus' to mean leadership, instead of the core concept.
Thinking Differences
Explain to an English speaker: nucleus has literal science senses plus metaphorical uses; learners often mix up core vs center and confuse nuclear with nucleus.
Learning Tips
- Read multiple definitions to see both literal and metaphorical uses.
- Compare with core, center, and heart to grasp nuance.
- Practice distinguishing noun (nucleus) from adjective (nuclear).
- Create phrases: the nucleus of the cell, the nucleus of the argument.
- Listen for pronunciation: NU-cle-us, stress on the first syllable.
- Use a dictionary to check Science vs figurative contexts.
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the meaning of 'nucleus'?
A.Inferior side
B.Central part
C.Outer layer
D.Top surface
Step 2: Usage
Which of the following sentences uses 'nucleus' correctly?
A.The outer layer of the cell is called the nucleus.
B.She painted the nucleus of the house yellow.
C.He found the nucleus on the top surface of the book.
D.The nucleus of the matter is very dense.
Step 3: Similar Words
What is a synonym for 'nucleus'?
A.Periphery
B.Core
C.Surface
D.Margin
Step 4: Opposite Words
What is an antonym for 'nucleus'?
A.Center
B.Periphery
C.Core
D.Middle
Step 5: Mastery
How is the concept of 'nucleus' relevant in science?
A.It represents the outer layer of a star.
B.It refers to the top surface of a plant cell.
C.It is the color of a rainbow.
D.It is the central part of an atom.
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