A catalogue of saints.
A picture or series of pictures painted on two tablets, usually connected by hinges.
Artistically-wrought tablets distributed by consuls, etc. of the later Roman Empire to commemorate their tenure of office; hence (transferred sense) a list of magistrates.
A novel published in two volumes forming one continuous story (as opposed to a duology or dilogy).
A double catalogue, containing in one part the names of living, and in the other of deceased, ecclesiastics and benefactors of a church.
A writing tablet consisting of two leaves of rigid material connected by hinges and shutting together so as to protect the writing within.
Any work made up of two parts treating complementary or contrasting aspects of one general topic.
A literary work consisting of two contrasting parts, such as a narrative telling the same story from two opposing points of view.
A book containing the prayers and responses needed when celebrating the Roman Catholic Mass throughout the year.
A prayer book.