- the hard central wood of the trunk of an exogenous tree; duramen.
Origin of heartwood
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for heartwood
She also authored Heartwood, a story collection for adult literacy students, and edited The Ringing Ear: Black Poets Lean South.Exclusive: The National Book Awards Longlist for Poetry
The Daily Beast
September 17, 2013
The duramen or heartwood is the inner, darker part of the log.
It was significant that practically all of the checking occurred in the heartwood.
The heartwood is darker than in most oaks, and the sapwood is brown.
The heartwood forms while the tree is living, not after it dies.
Posts sawed from the heartwood of large trees would do better.
- the central core of dark hard wood in tree trunks, consisting of nonfunctioning xylem tissue that has become blocked with resins, tannins, and oilsCompare 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
- 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.