in·ter·po·la·tor \ ̷ ̷ˈ ̷ ̷ ̷ ̷ˌlād.ə(r), -ātə-\noun (-s) Etymology: Latin, from interpolatus + -or 1.: interpolater 2.: a mechanically rotated clockwork instrument with two cams worked in conjunction with a relay to secure the correct telegraphic retransmission of any given number of consecutively repeated dots or dashes