heartwood

heart·wood  (härtwd)

n.

The older, nonliving central wood of a tree or woody plant, usually darker and harder than the younger sapwood. Also called duramen.

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heartwood [ˈhɑːtˌwʊd]

n

(Life Sciences & Allied Applications / Botany) the central core of dark hard wood in tree trunks, consisting of nonfunctioning xylem tissue that has become blocked with resins, tannins, and oils Compare sapwood

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heartwood  (härtwd)

The older, nonliving central wood of a tree or woody plant, usually darker and harder than the younger sapwood. Unlike the sapwood, it no longer conducts water, and its main function is the support of the tree.

Thesaurus

Noun

1.

heartwood - the older inactive central wood of a tree or woody plant; usually darker and denser than the surrounding sapwood duramen tree - a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms wood - the hard fibrous lignified substance under the bark of trees