Definition of "alburnum" []

• Sapwood; the thin white layer between the bark and wood of a tree (noun)

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• "Incisions are made into the alburnum of the seringueiras; below the wound small pots are attached, which twenty-four hours suffice to fill with a milky sap."
• "This consists in cutting a ring round the tree with axes through the bark and sapwood, or alburnum, into the brown wood beneath."
• "The growth of the trunk or stem of all exogenous plants, or those which increase in size on the outside of the stem, is brought about by the descent of certain formative tissue called cambium, elaborated by the leaves and descending between the old wood and the bark, where it is formed into alburnum or woody matter."