- the fruit of any of certain tropical or subtropical trees of the genus Sapindus, especially S. saponaria, used as a substitute for soap.
- the tree itself.
- any of various chiefly tropical American sapindaceous trees of the genus Sapindus, esp S. saponaria (or S. marginatus), having pulpy fruit containing saponin
- a related plant, S. drummondii, of the southwestern US
- the fruit of any of these trees
