Nucleus (Noun)
Meaning 1
The central structure of the lens that is surrounded by the cortex.
Classification
Nouns denoting body parts.
Examples
- The nucleus of the lens is composed of dense, compact fibers that are harder and more compact than the surrounding cortex.
- The hard nucleus at the center of the lens can cause difficulties during cataract surgery if not properly addressed.
- In the lens of the eye, the nucleus is the central part that is surrounded by the softer cortex.
- As we age, the nucleus of the lens becomes more compact and dense, leading to presbyopia.
- The nucleus of the lens provides rigidity and stability, allowing the cortex to more easily change shape in response to changing visual demands.
Synonyms
Hypernyms
Meaning 2
The positively charged dense center of an atom.
Classification
Nouns denoting natural objects (not man-made).
Hypernyms
Meaning 3
A part of the cell containing DNA and RNA and responsible for growth and reproduction.
Classification
Nouns denoting body parts.
Synonyms
Hypernyms
Related Words
Meaning 4
Any histologically identifiable mass of neural cell bodies in the brain or spinal cord.
Classification
Nouns denoting body parts.
Examples
- The olfactory nucleus is responsible for processing sensory information related to smell and transmitting it to the limbic system for further processing.
- A nucleus is a cluster of nerve cell bodies in the brain or spinal cord that are usually connected by synapses.
- Some research has focused on the function of the trigeminal nucleus in relation to the transmission of pain signals.
- Specialized neurons within the nucleus of the solitary tract respond to certain chemical signals to regulate appetite and satiety.
- The spinal cord's gracile nucleus receives and transmits proprioceptive signals, which provide information about the position and movement of the body.
Meaning 5
(astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail.
Classification
Nouns denoting natural objects (not man-made).
Hypernyms
Meaning 6
A small group of indispensable persons or things; "five periodicals make up the core of their publishing program".
Classification
Nouns denoting groupings of people or objects.