Where does this definition of principal ray come from?
This entry for principal ray is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Does principal ray appear elsewhere on Lughet?
Yes — principal ray 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.
