The Holy Eucharist is the oldest experience of Christian Worship as well as the most distinctive.
Eucharist comes from the Greek word, which means thanksgiving. In a particular sense, the word describes the most important form of the Church’s attitude toward all of life. The origin of the Eucharist is traced to the Last Supper at which Christ instructed His disciples to offer bread and wine in His memory.
The Eucharist is the most distinctive event of Orthodox worship because in it the Church gathers to remember and celebrate the Life, Death, and Resurrection of Christ and, thereby, to participate in the mystery of Salvation. (Source: Greek Orthodox Archdiocese of America)
The Eucharist is given during the Divine Liturgy.