'Soapberry tree' definitions:

Definition of 'soapberry tree'

(from WordNet)
noun
A tree of the genus Sapindus whose fruit is rich in saponin [syn: soapberry, soapberry tree]

Definition of 'Soapberry tree'

From: GCIDE
  • Soapberry tree \Soap"ber`ry tree`\ (Bot.) Any tree of the genus Sapindus, esp. Sapindus saponaria, the fleshy part of whose fruit is used instead of soap in washing linen; -- also called soap tree. [1913 Webster]