Lewis Short
lōcusta | lŭc- | lŏcusta (noun F) : (; scanned , Juvenc. in Matt. 3, 1, 339)
* A marine shell-fish, a lobster, Plin. 9, 30, 50, § 95: locustis squillisque magna ex parte sub eodem munimento praeduri eminent oculi,id. 11, 37, 55, § 152: marina,Petr. 35, 4.—Hence, dic mihi hoc etiam: solent tibi umquam oculi duri fieri? Men. Quid? tu me locustam censes esse, Plaut. Men. 5, 5, 24.— Prov.: prius pariet locusta Lucam bovem, said of something that can never take place, of something impossible, Naev. ap. Varr. L. L. 7, § 39 Müll.
* A locust, Plin. 8, 29, 43, § 104: esca ejus erat locustae,Vulg. Matt. 3, 4.
Charlton T. Lewis, Charles Short, A Latin Dictionary