variorum
An edition of a written work (especially the complete works of a classical writer) showing the notes and readings of a variety of different editors or commentators.
Johnson set out to produce a variorum, compiling and summarising the history of Shakespearean emendation and annotation
Where it comes from
From Latin variōrum, genitive plural masculine of varius (“various”), in the phrase editio cum notis variorum (“edition with various notes”).
Adapted from the Wiktionary entry variorum (CC BY-SA 4.0).