seconder

/S EH1 K AH0 N D ER0/
noun
  1. 1

    The person who makes a second to a motion in any formal procedure, such as a parliamentary procedure.

  2. 2

    (climbing) A person who seconds; a person who climbs after the leader

  3. 3

    (scouting) A Cub Scout serving as a second-in-command to a sixer.

  4. 4

    (in combination) Something that lasts or takes a specified number of seconds.