三叠纪 sāndiéjì Triassic Period Origin Definitions Defs Strokes Stroke Words Sentences Sents 三 sān numeral three the number three; 3叠 疊 dié to repeat (bound form) Repeated or recurring; to happen over and over again纪 紀 jì noun era (bound form) a period of time, such as a twelve-year cycle, a geological period, or a century; era