heart·wood 
(härtwd′)
(härtwd′)n.
The older, nonliving central wood of a tree or shrub, usually darker and harder than the younger sapwood. Also called duramen.
- ethnobotanically
- ethnobotanist
- ethnobotany
- ethnocentric
- ethnocentrically
- ethnocentricity
- ethnocentrism
- ethnogenesis
- ethnographer
- ethnographic
- ethnographical
- ethnographically
- ethnography
- ethnohistorian
- ethnohistoric
- ethnohistorical
- ethnohistory
- ethnologic
- ethnological
- ethnologically
- ethnologist
- ethnology
- ethnomethodologist
- ethnomethodology
- ethnomusicological