下寒武统 Save Sign in to save words Traditional (Taiwan): 下寒武統 xiàhánwǔtǒng ㄒㄧㄚˋ ㄏㄢˊ ㄨˇ ㄊㄨㄥˇ lower Cambrian series (geological strata from approx 530 million years ago) Character by character 下(xià)down 寒(hán)cold 武(wǔ)surname Wu 统(tǒng)gather A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0