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