jet d'eau
/ˌʒeɪ ˈdəʊ/ /ˌʒɛ ˈdəʊ/noun
An ornamental jet of water emitted from a fountain or pipe.
Origin
Mid 17th century; earliest use found in Robert Boyle (1627–1691), natural philosopher. From French jet d'eau, lit. ‘jet of water’ from jet + de + eau.