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the central, woody core of a tree, no longer serving for the conduction of water and dissolved minerals; heartwood is usually denser and darker in color than the outer sapwoodsapwood,
relatively thin, youngest, outer part of the woody stem of a tree, the part that conducts water and dissolved materials. In the cross section of a tree, the sapwood is recognizable by its texture and color; it is softer and lighter than the inner heartwood.
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. Before the synthesis of aniline dyes, the heartwood of several tropical trees (sold collectively under the commercial name brazilwood) was used to produce blue, purple, and red dyes. As a tree becomes older, the heartwood increases in diameter, whereas the sapwood remains about the same thickness. See woodwood,
botanically, the xylem tissue that forms the bulk of the stem of a woody plant. Xylem conducts sap upward from the roots to the leaves, stores food in the form of complex carbohydrates, and provides support; it is made up of various types of cells specialized for each of
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The center portion of a tree trunk that is no longer growing or carrying the sap; often harder and denser. See also: Douglas fir
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the older internal part of the wood of many timber trees. The heartwood is usually darker than the surrounding sapwood (cinnamon-brown in oak, yellow in barberry and acacia, reddish in yew, orange in alder, and almost black in ebony). As a result of the plugging of the vessels and tracheids with tyloses, resins, gums, essential oils, and other substances, the heartwood is almost impermeable to water and air and is resistant to rotting and fungal infestation.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


Xylem of an angiosperm.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

heartwood, duramen

Wood at the core of an exogenous tree; normally darker and much more durable than sapwood.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.


the central core of dark hard wood in tree trunks, consisting of nonfunctioning xylem tissue that has become blocked with resins, tannins, and oils
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
To verify the significance of differences between the individual analyzed parameters, analysis of variance and Tukey's multiple comparison test (P < 0.05) were performed using the two wood tissues (heartwood and sapwood) and the different chemical components in each tree as criteria.
Unbeknownst to her, behind this small engraving lies the Heartwood Hotel.
The chemical index showed that most of the isolated flavonoids were isolated from heartwood. In addition, an isoflavone formononetin (4), two flavanones (2S)-liquiritigenin (21) and (2S)-pinocembrin (24), an isoflavanone (3R)-sativanone (35), a chalcone isoliquiritigenin (65), and a pterocarpan medicarpin (71) were found more often in the heartwood of D.
Heartwood was founded in 2003 by myself and Neil Wadhawan.
The deal, which includes Heartwooda[euro](tm)s fully-owned unit Heartwood Wealth Management Ltd, was agreed on 6 February when Handelsbanken said it allows it to boost offering to existing and new clients.
TD Bank, The Provident Bank, Boothby Therapy Services and Heartwood Media were all honored at the Manchester gala for their support of the arts in their communities and statewide through donations of time, money and resources.
It is one of the most important tree species in tropical regions and probably the most highly-valued hardwood due to the quality, attractiveness and durability of its heartwood (Bishop 1999).
You're invited to plant a tree at Heartwood Forest near St Albans between 10am and 3pm this Sunday, in the Woodland Trust-owned 850-acre site.