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