heartwood

noun

heart·​wood ˈhärt-ˌwu̇d How to pronounce heartwood (audio)
: the older harder nonliving central wood of trees that is usually darker, denser, less permeable, and more durable than the surrounding sapwood

Examples of heartwood in a Sentence

Recent Examples on the Web
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First, there are bowls of ground Maré sandalwood heartwood, then sandalwood cuttings and the liquid extract of sandalwood, which gives a creamy, voluptuous smell. Jennifer Weil, Footwear News, 23 May 2025 Female beetles bore into the trunks and branches of young trees and excavate galleries in the heartwood. Janet B. Carson, Arkansas Online, 23 May 2025 The aerie is decked out with soaring 18-foot ceilings, reclaimed heartwood pine floors, and walls of floor-to-ceiling windows that flood the space with natural light. Abby Montanez, Robb Report, 16 May 2025 These termites invade the roots and then eat their way into the tree’s dead heartwood, which can contain lower amounts of these chemicals, Šobotník says. Katarina Zimmer, Smithsonian Magazine, 28 Feb. 2025 See All Example Sentences for heartwood

Word History

First Known Use

circa 1575, in the meaning defined above

Time Traveler
The first known use of heartwood was circa 1575

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Cite this Entry

“Heartwood.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heartwood. Accessed 6 Jun. 2025.

Kids Definition

heartwood

noun
heart·​wood -ˌwu̇d How to pronounce heartwood (audio)
: the older harder nonliving and usually darker wood of the central part of a tree trunk compare sapwood

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