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