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