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