Definitions

chuān (chemistry) tritium

Etymology phono-semantic

gas

Semantic: Phonetic:

About

The character is a modern addition to the Chinese lexicon, created specifically for scientific and chemical use. It combines the semantic radical , which marks it as a gaseous element, with the phonetic component (chuān). While primarily supplies the sound, its three strokes also visually allude to the three isotopes of hydrogen. The character was coined to represent tritium, the radioactive hydrogen isotope whose nucleus contains one proton and two neutrons. As a strictly modern invention for chemical nomenclature, it has no ancient etymology, alternative meanings, or colloquial applications; it functions exclusively as an unambiguous technical term in physics and chemistry.