An anagram is a word formed by rearranging all the letters of another word, using each letter exactly once. These words use every letter from "SSSETET":
A venomous two-winged African fly (Glossina morsitans) whose bite is very poisonous, and even fatal, to horses and cattle, but harmless to men. It renders extensive districts in which it abounds uninhabitable during certain seasons of the year.