A tetramorph is a symbolic arrangement of four differing elements, or the combination of four disparate elements in one unit. The term is derived from the Greek tetra, meaning four, and morph, shape.
The word comes from the Greek for "four forms" or "shapes". In English usage, each symbol may be described as a tetramorph in the singular, and a group as "the tetramorphs", but usually only in contexts where all four are included. The tetramorphs were especially common in Early Medieval art, above all in illuminated Gospel books, but remain common in religious art to the present day.
In Christian art, the tetramorph is the union of the symbols of the Four Evangelists, derived from the four living creatures in the Book of Ezekiel, into a single figure or, more commonly, a group of four figures. Each of the four Evangelists is associated with one of the living creatures, usually shown with wings. The most common association, but not the original or only, is: Mark the King, Lion; Luke the lowly Servant, Ox; Matthew the Angel; and John the Eagle. In Christian art and iconography, Evangelist portraits are often accompanied by tetramorphs, or the symbols alone used to represent them. Evangelist portraits that depict them in their human forms are often accompanied by their symbolic creatures, and Christ in Majesty is often shown surrounded by the four symbols.