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