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