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