hé​zǐ

nuclear

核子 hé​zǐ
nuclear noun
relating to or utilizing nuclear energy, radiation, or weapons

Many countries are discussing the safety issues of nuclear energy.

nucleon noun
a constituent part of an atomic nucleus, specifically a proton or a neutron

The atomic nucleus is composed of two types of nucleons: protons and neutrons.

Frequency

Movie subtitles
1.73 per million appears in 1% of films
Written text
0.476 per million

Sources

Definitions
CC-CEDICT