A cross potent (plural: crosses potent), also known as a crutch cross, is a form of heraldic cross with crossbars at the four ends. In French, it is known as croix potencée, in German as a Kruckenkreuz, all translating to "crutch cross".
Potent is an old word for a crutch, from a late Middle English alteration of Old French potence "crutch" The term potent is also used in heraldic terminology to describe a 'T' shaped alteration of vair, and potenté is a line of partition contorted into a series of 'T' shapes.
In heraldic literature of the 19th century, the cross potent is also known as the "Jerusalem cross" due to its occurrence in the attributed coat of arms of the Kingdom of Jerusalem. This convention is reflected in Unicode, where the character ☩ (U+2629) is named CROSS OF JERUSALEM. The name Jerusalem cross is more commonly given to the more complex symbol consisting of a large Greek cross or cross potent surrounded by four smaller Greek crosses.