chalcedony
/kælˈsedənɪ/noun
(pl. -ies)［mass noun］
- a microcrystalline type of quartz occurring in several different forms including onyx and agate玉髓。
派生词
chalcedonic
/ˌkælsɪˈdɒnɪk/ adjective词源
late Middle English: from Latin calcedonius, chalcedonius （often believed to mean 'stone of Chalcedon'， but this is doubtful）， from Greek khalkēdōn.