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• n  seed of Mexican shrubs of the genus Sebastiana containing the larva of a moth whose movements cause the bean to jerk or tumble

• jumping seed
• Mexican jumping bean

News & Articles

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• Caterpillar Can Hop for 3 Days in Leafy 'Sleeping Bag'
  Hop over, Mexican jumping beans: Scientists have discovered another fascinating caterpillar species with impressive jumping skills.
  Aug. 20, 2013 - LiveScience.com via Yahoo! News