nucleus
/ˈnukliəs/
noun
- The central part of an atom, containing protons and neutrons.
- The nucleus of an atom is very small but contains most of its mass.
- Scientists study the nucleus to understand how atoms hold together.
- When the nucleus splits, it releases a huge amount of energy.
- The central part of a cell that contains the genetic material (DNA).
- In a human cell, the nucleus is surrounded by a membrane.
- When a cell divides, the nucleus first splits into two.
- The nucleus controls the cell's activities and stores its DNA.
- The central or most important part of something around which other parts are grouped.
- The nucleus of the argument is about fairness.
- The old town forms the nucleus of the modern city.
- A small group of volunteers became the nucleus of the charity.