E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Pax.
The “kiss of peace.” Also a sacred utensil used when mass is celebrated by a high dignitary. It is sometimes a crucifix, sometimes a tablet, and sometimes a reliquary. The pax is omitted on Maundy Thursday, from horror at the kiss of Judas.
