单词	alburnum
释义	alburnum /alˈbəːnəm / noun Another term for sapwood.The annual rings are thinner compared to the alburnum.... It often happens after the circle of bark has been removed, a small portion of the inner bark adheres to the alburnum. The wood, used for medicinal purposes, consists of turnings from the workshop of the turner, and is a uniform mixture of the alburnum and duramen, but that used in medicine should consist only of the latter. Origin Mid 17th century: from Latin, from albus 'white'.
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