fission

核分裂

原子の中心にある核が小さく分かれ、エネルギーを放出すること。

やさしい英語で： The splitting of the centre of an atom into smaller parts, releasing energy.

• Fission releases energy.
• The reactor uses nuclear fission to produce heat.
• Neutrons can trigger fission in uranium atoms.

類義語： nuclear splitting

反対語： fusion

よく使う表現： nuclear fission, fission reactor, fission products

分裂

一つのものが、別々の二つのものに分かれる過程。

やさしい英語で： A process in which one thing divides into two separate things.

• Fission divided the group in two.
• The diagram shows fission into two separate parts.
• Repeated fission produced several independent groups.

使い方： fission into something (The study traced the group’s fission into two smaller communities.)

類義語： splitting, division

反対語： fusion

よく使う表現： fission into something, social fission

二分裂

一つの細菌が分かれて、二つの新しい細胞になること。

やさしい英語で： A process in which a bacterium divides to make two new cells.

• These bacteria reproduce by fission.
• Binary fission creates two daughter cells.
• Warm conditions increased the rate of fission in the culture.

類義語： cell division

よく使う表現： binary fission, fission in bacteria

分裂させる

原子や細胞などを、小さな部分に分かれさせる。

やさしい英語で： To make an atom, cell, or other thing split into smaller parts.

• Neutrons can fission these nuclei.
• The experiment fissioned a small number of atoms.
• They used particles to fission the heavy nuclei.

類義語： split, divide

反対語： fuse

よく使う表現： fission uranium nuclei, fission an atom

分裂する

原子や細胞のように、小さな部分に分かれる。

やさしい英語で： To split into smaller parts, as an atom or cell does.

• Some nuclei fission spontaneously.
• The atoms fissioned after absorbing neutrons.
• These cells fission into two daughter cells.

使い方： fission into something (The nucleus can fission into two smaller nuclei.)

類義語： split, divide

反対語： fuse

よく使う表現： fission spontaneously, fission into something