Where does this definition of coal seam come from?
This entry for coal seam is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Is coal seam a noun, verb, or something else?
In this entry, coal seam 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.