nucleus

核

物の中心部分。特に原子や生きた細胞の中心。

やさしい英語で： 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.

使い方： nucleus of something (The nucleus of an atom contains protons.)

類義語： core

よく使う表現： atomic nucleus, central nucleus, nucleus of something

細胞核

細胞の中で薄い膜に包まれ、遺伝情報を持つ部分。

やさしい英語で： 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.

使い方： nucleus of a cell (The nucleus of a cell contains DNA.)

類義語： cell nucleus

よく使う表現： cell nucleus, nucleus membrane, nucleus of something

中核、核

人や物が加わって大きくなる集団や集まりの、最初の小さな核。

やさしい英語で： 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.

使い方： nucleus of something (These books formed the nucleus of our collection.)

類義語： core, foundation

よく使う表現： form the nucleus, nucleus of something, a small nucleus