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

First Known Use of soapberry

1693


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