nucleus
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/ˈnuːkliəs/
🇬🇧
/ˈnjuːkliəs/
The center of an atom that has most of its mass and a positive charge.
The nucleus of an atom contains protons and neutrons.
The center of a cell that holds the genetic material.
The nucleus controls the activities of the cell.
The central part of something where other parts gather.
These paintings will form the nucleus of a new collection.