e4
è
to whitewash; to plaster

strokes 9
radical
strokes after radical 6
白垩 白堊 bai2 e4
báiè
chalk

白垩纪 白堊紀 bai2 e4 ji4
báiè
Cretaceous (geological period 140-65m years ago)

白垩世 白堊世 bai2 e4 shi4
báièshì
Cretaceous (geological period 140-65m years ago)