Source : Webster's Revised Unabridged Dictionary (1913)

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.

Source : WordNet®

termer
     n : a person who serves a specified term; "there are not many
         fourth termers in the Senate"