hé​zǐ

nucleon

核子 hé​zǐ
nucleon
A collective term for 质子 zhì​zǐ and 中子 zhōng​zǐ which are the constituents of an atomic nucleus
nuclear
Relating to an atomic nucleus; used attributively to mean nuclear as in nuclear weapons or nuclear power
atomic nucleus
The small dense region consisting of protons and neutrons at the center of an atom

Frequency

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

Sources