(n) chiefly tropical New and Old World deciduous and evergreen trees and shrubs bearing leathery drupes with yellow translucent flesh; most plants produce toxic saponins, Syn. family Sapindaceae, soapberry family
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
(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 ]