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heartwood

 - 2 dictionary results

heart⋅wood

[hahrt-wood]
–noun
the hard central wood of the trunk of an exogenous tree; duramen.

Origin:
1795–1805; heart + wood 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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heart·wood   (härt'wŏŏd')   
n.  The older, nonliving central wood of a tree or woody plant, usually darker and harder than the younger sapwood. Also called duramen.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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