Cicada \Ci*ca"da\ (s[i^]*k[=a]"d[.a]), n.; pl. E. Cicadas (-d[.a]z), L. Cicad[ae] (-d[=e]). [L.]

(Zo["o]l.) Any species of the genus Cicada. They are large hemipterous insects, with nearly transparent wings. The male makes a shrill sound by peculiar organs in the under side of the abdomen, consisting of a pair of stretched membranes, acted upon by powerful muscles. A noted American species (C. septendecim) is called the seventeen year locust. Another common species is the dogday cicada.

Source: Webster's Revised Unabridged Dictionary (1913)