Dictionary:

sapwood

  (săp'wʊd')

The newly formed outer wood located just inside the vascular cambium of a tree trunk and active in the conduction of water. Sapwood is usually lighter in color than heartwood.

The outer zone of wood in a tree, next to the bark. Sapwood is generally lighter than heartwood.

In a tree, the layer of usually light-colored wood between the interior heartwood and the bark, through which water and nutrients are carried.

A section of a Yew branch showing 27 annual growth rings, pale sapwood and dark heartwood, and pith (centre dark spot). The dark radial lines are small knots.

For the NATO reporting name for the R-7 Semyorka intercontinental ballistic missile, see SS-6 Sapwood.

Sapwood is the outer layer of wood in a tree, next to the bark. Sapwood will mature into Truewood as the tree grows. See also wood#Heartwood and sapwood.

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