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heartwood

[hahrt-woo d] /ˈhɑrtˌwʊd/
noun
1.
the hard central wood of the trunk of an exogenous tree; duramen.
Origin of heartwood
1795-1805
First recorded in 1795-1805; heart + wood1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for heartwood
Contemporary Examples
Historical Examples
  • The duramen or heartwood is the inner, darker part of the log.

    Seasoning of Wood Joseph B. Wagner
  • It was significant that practically all of the checking occurred in the heartwood.

    Seasoning of Wood Joseph B. Wagner
  • The heartwood is darker than in most oaks, and the sapwood is brown.

    American Forest Trees

    Henry H. Gibson
  • The heartwood forms while the tree is living, not after it dies.

    American Forest Trees

    Henry H. Gibson
  • Posts sawed from the heartwood of large trees would do better.

    American Forest Trees

    Henry H. Gibson
  • For some reason, the heartwood of certain species is prone to decay.

    American Forest Trees

    Henry H. Gibson
  • The summerwood is narrow, but dark in color in the heartwood.

    American Forest Trees

    Henry H. Gibson
  • The pores in the sapwood are open, but many of them are closed in heartwood.

    American Forest Trees

    Henry H. Gibson
  • This is a small tree, which usually develops little or no heartwood.

    American Forest Trees

    Henry H. Gibson
British Dictionary definitions for heartwood

heartwood

/ˈhɑːtˌwʊd/
noun
1.
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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heartwood in Science
heartwood
  (härt'wd')   
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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16
15
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