服刑者
Termer \Term"er\, n. 1. One who resorted to London during the law term only, in order to practice tricks, to carry on intrigues, or the like. [Obs.] [Written also {termor}.] --B. Jonson. 2. (Law) One who has an estate for a term of years or for life.
termer n : a person who serves a specified term; "there are not many fourth termers in the Senate"