HOST is also used by way of abbreviation for hostia, a victim or sacrifice offered to the Deity. In this sense, host is more immediately understood of the person of the Word Incarnate, who was offered up an host or hostia to the Father on the cross for the sins of mankind.
Host, in the church of Rome, a name given to the elements used in the eucharist, or rather to the consecrated wafer, which they pretend to offer up every day as a new host or sacrifice for the sins of mankind.