About
The character 铥 (diū) is a modern creation representing the rare earth element thulium (atomic number 69). It is a phono-semantic compound formed according to standard chemical nomenclature. The left side is the semantic radical 钅 (jīn), meaning metal, which classifies it as a metallic element. The right side is the phonetic component 丢 (diū), which provides the pronunciation, echoing the first syllable of the element's international name. Its traditional form is 銩, using the metal radical 金. With a definition exclusively tied to chemistry, 铥 exemplifies how the Chinese writing system adapts to incorporate modern scientific terminology.