Eulogia

To Severus he sends "a Campanian loaf from his cell, as a eulogia," together with a boxwood casket, and begs him, as before, by accepting the loaf in the name of the Lord to convert it into a eulogia.

Source: wiktionary

At Easter it was even sent into other dioceses, bishops being in the habit of sending the consecrated host to each other as a mark of intercommunion, of brotherhood and amity. To the sacred host, on these occasions, the name of eulogia was given, and thus until the fifth century the word eulogia appears to have been synonymous with eucharistia, and used interchangeably with it to designate the sacrament of the altar, the chalice and bread of benediction spoken of by St. Paul.

Source: wiktionary

It was there decreed that the hallowed elements were no longer to be sent as Eulogiae into strange dioceses, at the feast of Easter.

Source: wiktionary

Popular devotion to the consecrated host grew significantly from the eleventh century onwards, and a number of twelfth- and thirteenth-century texts indicate that it was reverence, not indifference, which discouraged frequent lay reception of the eucharist. The eulogia, meanwhile, came to be regarded as, at least in a partial sense, a surrogate for communion.

Source: wiktionary