The Old French word graal, meaning a dish or serving vessel, gave the Holy Grail its name.
The term appears in medieval French romances, most famously Chrétien de Troyes’s Perceval, ou le Conte du Graal. In that poem, a graal is carried in a mysterious procession during the hero’s visit to the Fisher King. Chrétien does not clearly define it as Christ’s cup; the object’s meaning develops across later literature.
Modern English uses “Grail” as if it were a proper name, but the medieval word originally described a type of vessel. Its precise linguistic history is debated, and scholars have proposed connections with terms for bowls, dishes, or serving vessels.
Later writers Christianized and magnified the object, turning the graal into the relic now called the Holy Grail. This explains why early literary descriptions and later popular images do not always agree about its shape or identity.