nicker nut

noun
nick·​er nut
variants: or less commonly nicker or nicker-seed or nickar nut \ ˈnikə(r)(-​) \
plural -s

Definition of nicker nut

: the very hard shiny gray seed of bonduc (see bonduc sense 2)

History and Etymology for nicker nut

nicker, probably from obsolete nicker marble, modification of Dutch knikker, from knikken to crack, snap, from Middle Dutch cnicken, probably of imitative origin like Middle Low German knicken to crack, snap, Middle High German knacken to make a cracking noise

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