寒武纪 (寒武紀) hánwǔ jì

hánwǔ jì proper noun Cambrian period
Domain: Modern Chinese 现代汉语 , Subdomain: Geology , Concept: Geological Period 地质年代
Notes: (CC-CEDICT '寒武紀'; Guoyu '寒武紀'; Wikipedia '寒武纪')

Also contained in

寒武纪大爆发寒武纪生命大爆发前寒武纪