前寒武紀 Save Sign in to save words Simplified: 前寒武纪 qiánhánwǔjì ㄑㄧㄢˊ ㄏㄢˊ ㄨˇ ㄐㄧˋ pre-Cambrian, geological period before c. 540m years ago Character by character 前(qián)front 寒(hán)cold 武(wǔ)surname Wu 紀(jì)order A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0