1911 Encyclopædia Britannica/Alburnum
|←Albuquerque||1911 Encyclopædia Britannica, Volume 1
|See also Sapwood on Wikipedia; and our 1911 Encyclopædia Britannica disclaimer.|
ALBURNUM (sapwood), the outermost and youngest part of the wood of a tree, through which the sap rises. It is distinguished from the harder inner and older wood, the duramen or heart-wood.