ˈprämpchəˌwerē noun
( -es )
Etymology: Late Latin promptuarium storehouse, from Latin, neuter of promptuarius serving for distribution, from promptus act of taking out (in the phrase in promptu visible, at hand) (from promptus, past participle of promere to take out) + -arius -ary — more at prompt
1. obsolete : storehouse , repository
2. : a book of ready reference