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