heartwood

noun heart·wood \ ˈhärt-ˌwu̇d \

Definition of heartwood

: the older harder nonliving central wood of trees that is usually darker, denser, less permeable, and more durable than the surrounding sapwood

Recent Examples of heartwood from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'heartwood.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of heartwood

circa 1575


HEARTWOOD Defined for Kids

heartwood

noun heart·wood \ ˈhärt-ˌwu̇d \

Definition of heartwood for Students

: the usually dark wood in the center of a tree

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