In botany, waterleaf can mean:

In architecture, waterleaf means:

Any plant which is a member of the waterleaf family, Hydrophyllaceae

Any plant of the genus Hydrophyllum

A leaf vegetable, Talinum fruticosum (of the family Portulacaceae)

Waterleaf (architecture), sculptural decoration used on the capitals of columns in late 12th century Romanesque architecture