from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The essence of what it means to be a tree; the qualities that make a tree what it is.
- n. The suitability of an evolutionary tree for representing the structure of a population; the degree to which a population structure can be accurately described as a tree of descent, with different branches evolving independently after they split.
- n. The condition of being a tree; acyclicity and connectedness.
tree + -ness (Wiktionary)