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