Definition of 第四紀 (だいよんき)
だいよんき
                        第四紀
だいよんき
daiyonki
noun
•
                
Quaternary period
Other readings:
                第四紀【だいしき】
                Related Kanji
| 第 | No., residence | 
| 四 | four | 
| 紀 | chronicle, account, narrative, history, annals, geologic period |