1. seed of Mexican shrubs of the genus Sebastiana containing the larva of a moth whose movements cause the bean to jerk or tumble; [syn: jumping bean, jumping seed, Mexican jumping bean]
WordNet (r) 3.0 (2006):
Mexican jumping bean
n 1: seed of Mexican shrubs of the genus Sebastiana containing
the larva of a moth whose movements cause the bean to jerk
or tumble [syn: jumping bean, jumping seed, Mexican
jumping bean]