Definition of "soapberry" []

• Any of various chiefly tropical trees of the genus Sapindus, having pulpy fruit that lathers like soap. (noun)
• The fruit of any of these trees. (noun)
• The buffalo berry. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Species range from drought-resistant shrubs such as creosote bush Larrea tridentata and prickly pear Opuntia spp., sotol Dasilyrion wheeleri and Agave spp. to walnut Juglans spp., hackberry Celtis spp., oak Quercus spp. and soapberry trees Sapindus spp. in the richer soil of the canyons."
• "Another fruit of Asian origin, lychee is a member of the soapberry family."
• "These are followed by alder Alnus spp., willow, soapberry Sapindus drummondi and cottonwoodPopulus balsamifera var. trichocarpa."