nucleus JUST WRITTEN FOR YOU
/ˈnjuː.kli.əs/ · nu·cle·us
noun
- The core, central part of something, around which other elements are assembled. The nucleus of the city is where most of the shops and restaurants are located.
- An initial part or version that will receive additions. This collection will form the nucleus of a new library, which will be expanded in the coming months.
- The massive, positively charged central part of an atom, made up of protons and neutrons. The nucleus of the atom is surrounded by electrons, which orbit around it.
Did you know? The term 'nucleus' was first used in English in the 17th century to describe the central part of an atom, and has since been applied to other contexts, including biology and social science.