In Christianity, the word Pantocrator is generally thought to mean Christ in Majesty or Christ the King. Other meanings include: the omnipotent, the almighty, ruler of all, the king of kings. The term is primarily used in Eastern Orthodox or Eastern Catholic traditions. It is most often associated with icons and mosaics.
Paul of Tarsus used the term once in 2 Corinthians 6:18: "I will be a Father to you, and you will be my sons and daughters, says the Lord Almighty [Pantocrator]." The Book of Revelations uses the term several times to refer to God and Christ interchangeably and as one.
The most famous Christ Pantocrator icon, and the one most significant for the Shroud of Turin is the Christ Pantocrator from St. Catherine's Monastery in the Sinai pictured here.