白亜紀 はくあき Cretaceous period #30,078 Meanings noun Cretaceous period Its kanji 白 ハク、ビャク · しろ、しら-、しろ.い white 亜 ア · つ.ぐ Asia, rank next, come after, -ous 紀 キ chronicle, account, narrative, history, annals, geologic period