草木灰 Traditional form: 草木灰 Pinyin (reading): cǎomùhuī Definitions: plant ash Characters: 草 - grass, herbs; straw, thatch 木 - tree; wood, lumber; wooden 灰 - ashes; dust; lime, mortar Traditional characters: 草 - grass, herbs; straw, thatch 木 - tree; wood, lumber; wooden 灰 - ashes; dust; lime, mortar