periodical cicada
noun
1- an American cicada whose nymphs emerge in large numbers periodically in a seventeen-year (or, in the south, a thirteen-year) cycle周期蝉, 晚秀蝉。
1.1
- Magicicada septendecim, family Cicadidae, suborder Homoptera. Alternative name: seventeen-year cicada.拉丁名Magicicada septendecim, 蝉科, 同翅亚目。又名：十七年蝉。