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 "RDTEEEPN":
That part of a circulating decimal which recurs continually, ad infinitum: -- sometimes indicated by a dot over the first and last figures; thus, in the circulating decimal .728328328 + (otherwise .7/8/), the repetend is 283.