(n.) The hard, central part of the trunk of a tree, consisting of the old and matured wood, and usually differing in color from the outer layers. It is technically known as duramen, and distinguished from the softer sapwood or alburnum.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). heartwood. Retrieved September 26, 2026, from http://smartdefine.org/heartwood/definitions/2015488 |
| Chicago | Webster's. 2011. "heartwood" http://smartdefine.org/heartwood/definitions/2015488 (accessed September 26, 2026). |
| Harvard | Webster's 2011, heartwood, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/heartwood/definitions/2015488>. |
| MLA | Webster's. "heartwood" 27 May 2011. Web. 26 September 2026. <http://smartdefine.org/heartwood/definitions/2015488> |