Where does this definition of biconcave lens come from?
This entry for biconcave lens is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Does biconcave lens appear elsewhere on Lughet?
Yes — biconcave lens appears under other sources or language pairs in Lughet's collection. See the list below.
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.
