Hippocastanaceae hip·po·cas·tanaceae uncommon noun 1. trees having showy flowers and inedible nutlike seeds in a leathery capsule Synonymsfamily Hippocastanaceaehorse-chestnut family Related words Broader terms dicot family Parts Sapindales Part of Aesculus WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
