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noun soap·ber·ry \-ˌber-ē\

Definition of soapberry

  1. :  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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