Definition of "fermentum" [fermentum]

• In the medieval church, a portion of the eucharist reserved from a previous consecration, which was brought to a priest about to celebrate mass. (noun)

The Century Dictionary (Public Domain)

• "Curabitur metus diam, fermentum sed lobortis sit amet, volutpat nec dui."
• "I have a nagging suspicion that he's adding the fermentum, the little piece of the host that the priest drops into the chalice after consecration and fraction."
• "In vino veritas, perhaps, but not in fermentum beer."