Definitions for jumping bean
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Random House Webster's College Dictionary
jump′ing bean`(n.)
the seed of any of certain Mexican plants of the genera Sebastiania and Sapium, of the spurge family: the movements of a moth larva inside the seed cause it to move about or jump.
Category: Plants
Origin of jumping bean:
1885–90
Princeton's WordNet
jumping bean, jumping seed, Mexican jumping bean(noun)
seed of Mexican shrubs of the genus Sebastiana containing the larva of a moth whose movements cause the bean to jerk or tumble
Wiktionary
jumping bean(Noun)
A Mexican jumping bean.
Citation
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"jumping bean." Definitions.net. STANDS4 LLC, 2013. Web. 20 May 2013. <http://www.definitions.net/definition/jumping bean>.