Jumping-bean meaning

jŭmpĭng
A seed of certain Mexican plants, especially of the genus Sebastiania, containing the larva of a tortricid moth whose movements cause the seed to jerk or roll.
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The seed of any of several Mexican plants (esp. genus Sebastiana) of the spurge family, containing the larva of a small moth (Cydia saltitans), which by its movements makes the seed jump or roll about.
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A Mexican jumping bean.
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