See also: sap-wood

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From sap +‎ wood.

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

sapwood (countable and uncountable, plural sapwoods)

  1. The wood just under the bark of a stem or branch; it differs from the heartwood in color and in physiologic activity (flow of sap).
    A popular myth is that sapwood is not as strong as heartwood.

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