'Nicker nut' definitions:

Definition of 'nicker nut'

From: WordNet
noun
Hard shiny grey seed of a bonduc tree; used for making e.g. jewelry [syn: bonduc nut, nicker nut, nicker seed]

Definition of 'Nicker nut'

From: GCIDE
  • Nicker nut \Nick"er nut`\ A rounded seed, rather smaller than a nutmeg, having a hard smooth shell, and a yellowish or bluish color. The seeds grow in the prickly pods of tropical, woody climbers of the genus Caesalpinia. Caesalpinia Bonduc has yellowish seeds; Caesalpinia Bonducella, bluish gray. [Spelt also {neckar nut}, nickar nut.] [1913 Webster]