Bible Dictionaries
Heartwood

Webster's Dictionary

(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.

Bibliography Information
Webster, Noah. Entry for 'Heartwood'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​h/heartwood.html. 1828.