jumping bean

英 美
  • n.(墨西哥大戟属树的种子;蛾的幼虫多寄生其中;故能跳动)跳豆
  • bean n.豆;豆科植物
  • jumping n.跳跃;突变现象adj.跳跃的;用于跳跃的动词jump的现在分词.
Noun:
  1. seed of Mexican shrubs of the genus Sebastiana containing the larva of a moth whose movements cause the bean to jerk or tumble