Where does this definition of tree line come from?
This entry for tree line is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is tree line a noun, verb, or something else?
In this entry, tree line is tagged as 2n..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.