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