Anamnesis: Calling to mind or recollection. This is the prayer, after the consecration, where the Church calls to mind the Lord's passion, resurrection and ascension into heaven. This is the high point of the Mass as a memorial of what happened during Christ's visible stay on earth.
Luke 22:19, RSV
And he took bread, and when he had given thanks he broke it and gave it to them, saying, "This is my body which is given for you. Do this in remembrance (anamnēsis) of me."