soapberry
noun
soap·ber·ry
| \ ˈsōp-ˌber-ē
\
\
Definition of soapberry
: any of a genus (Sapindus of the family Sapindaceae, the soapberry family) of chiefly tropical woody plants
also
: the fruit of a soapberry and especially of a tree (S. saponaria) that is saponin-rich and used as a soap substitute
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