nucleus

noyau

Partie centrale de quelque chose, notamment d’un atome ou d’une cellule vivante.

En anglais simple : The central part of something, especially an atom or a living cell.

• The nucleus lies at the center of the atom.
• Electrons move around the nucleus.
• Scientists studied the nuclei of several different atoms.

Comment l'utiliser : nucleus of something (The nucleus of an atom contains protons.)

Synonymes : core

Expressions courantes : atomic nucleus, central nucleus, nucleus of something

noyau cellulaire

Partie d’une cellule entourée d’une fine membrane et contenant son information génétique.

En anglais simple : The part inside a cell, surrounded by a thin covering, that holds its genetic information.

• The nucleus holds the cell’s genetic information.
• She could see the nucleus through the microscope.
• These cells have two nuclei.

Comment l'utiliser : nucleus of a cell (The nucleus of a cell contains DNA.)

Synonymes : cell nucleus

Expressions courantes : cell nucleus, nucleus membrane, nucleus of something

noyau

Petit groupe ou ensemble de départ qui grandira avec l’ajout de personnes ou de choses.

En anglais simple : A small starting group or collection that will grow as more people or things are added.

• Five volunteers formed the nucleus of the team.
• Her books became the nucleus of a new library.
• We built the club around a small nucleus of friends.

Comment l'utiliser : nucleus of something (These books formed the nucleus of our collection.)

Synonymes : core, foundation

Expressions courantes : form the nucleus, nucleus of something, a small nucleus