Nucleus

/njˈuːklɪəs/

/ˈnukɫiəs/

Nucleus

(biology) the part of a cell that contains most of the genetic information

a small group of indispensable persons or things

the positively charged dense center of an atom

any histologically identifiable mass of neural cell bodies in the brain or spinal cord

the central structure of the lens that is surrounded by the cortex

the central core of a comet, which is composed of ice, dust, and rocky materials

the central and typically sonorous part of a syllable, usually occupied by a vowel or a vowel-like sound

Example

The nucleus, an organelle housing genetic material, regulates cell activities.

Cometary nuclei are composed of a mixture of water ice, dust, and organic compounds.

Galactic nuclei often harbor supermassive black holes at their centers.

The nucleus of Comet Hale-Bopp is believed to be several kilometers in diameter.

The nucleus of Comet Halley is thought to be a mixture of water ice, carbon dioxide ice, and various organic compounds.

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