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