poller

/P AA1 L ER0/
noun
  1. 1

    one who votes

  2. 2

    one who registers voters or conducts a poll

  3. 3

    (computing) a task or process that periodically checks for a condition being satisfied, such as the availability of new data

  4. 4

    one who polls or lops trees

  5. 5

    one who cuts hair; a barber