[jumping bean] n (ca. 1889): a seed of any of several Mexican shrubs (genera Sebastiania and Sapium) of the spurge family that tumbles about because of the movements of the larva of a small moth (Carpocapsa saltitans) inside it
JUMPING BEAN
Meaning of JUMPING BEAN in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012