zhì​zǐ

proton

质子 (質子) zhì​zǐ
proton noun
positively charged nuclear particle
hostage prince noun
a prince sent to be held as a hostage in a neighboring state in ancient China

Frequency

Movie subtitles
0.540 per million appears in 0% of films
Written text
0.976 per million

Sources

Definitions
CC-CEDICT