(Greek: eucharistia, thanksgiving)
The sacrament and sacrifice of the New Law in which Christ the Lord is Himself present, offered, and received under the species of bread and wine. The name is from the account of the Last Supper. The Catholic Church teaches that
"in the Eucharist, the Body and Blood of the God-man are really, truly, substantially, and abidingly present together with His Soul and Divinity for the nourishment of souls, by reason of the Transubstantiation of the bread and wine into the Body and Blood of Christ, which takes place in the unbloody sacrifice of the New Testament, i,e.,the Mass."