apple nut

English Thesaurus

1. nutlike seed of a South American palm; the hard white shell takes a high polish and is used for e.g. buttons (noun.plant)

hypernym	:	seed,
definition	:	a small hard fruit (noun.plant)

part meronym	:	ivory palm, ivory plant, ivory-nut palm, phytelephas macrocarpa,
definition	:	a stemless palm tree of Brazil and Peru bearing ivory nuts (noun.plant)