Where does this definition of ballon d'essai come from?
This entry for ballon d'essai is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is ballon d'essai a noun, verb, or something else?
In this entry, ballon d'essai is tagged as n..
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.
