locust
/ˈləʊkəst/noun
1
- a large and mainly tropical grasshopper with strong powers of flight. It is usually solitary, but from time to time there is a population explosion and it migrates in vast swarms which cause extensive damage to crops蝗虫。
1.1
- Several species in the family Acrididae, including the migratory locust(Locusta migratoria), which is sometimes seen in Europe.数种见于蝗科, 包括有时可见于欧洲的飞蝗（拉丁名Locusta migratory）。
1.2
- （亦作seventeen-year locust）US the periodical cicada〈美〉周期蝉, 十七年蝉。
2
- （亦作locust bean）the large edible pod of some plants of the pea family, in particular the carob bean, which is said to resemble a locust长角豆。
3
- （亦作locust tree）any of a number of pod-bearing trees of the pea family, in particular the carob tree and the false acacia长角豆树, 洋槐, 刺槐。
词源
Middle English: via Old French locuste from Latin locusta 'locust, crustacean'.