Where does this definition of optical window come from?
This entry for optical window is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Does optical window appear elsewhere on Lughet?
Yes — optical window 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.
