第四纪 Save Sign in to save words Traditional (Taiwan): 第四紀 dìsìjì ㄉㄧˋ ㄙˋ ㄐㄧˋ fourth period quaternary (geological period covering the recent ice ages over the last 180,000 years) Character by character 第(dì)(prefix indicating ordinal number, as in 第六 dìliù "sixth") 四(sì)four 纪(jì)order A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0