HEARTWOOD as NOUN

1. Meaning
   • the older inactive central wood of a tree or woody plant
   • usually darker and denser than the surrounding sapwood
   Synonym(s)
   • duramen (what does duramen mean?)
   Hypernyms(s) heartwood is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
   • wood (what does wood mean?)