太古 tàigǔ antiquity Origin Definitions Defs Strokes Stroke Words Sentences Sents 太古代 Tàigǔdài Archaeozoic Archaeozoic (geological era before 2500 million years ago)太古宙 Tàigǔzhòu Archaean Archaean (geological eon before 2500m years ago)太古洋行 Tàigǔ Yángháng Butterfield and Swire Butterfield and Swire (Hong Kong merchant and banking firm)