Where does this definition of roll booster come from?
This entry for roll booster is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is roll booster a noun, verb, or something else?
In this entry, roll booster is tagged as 2n..
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.