D defs.my
Entry 2 senses Webster, 1913

Tracker

/trăk'-ẽr/ · Track·er · IPA /ˈtɹækə(ɹ)/
01 n. One who, or that which, tracks or pursues, as a man or dog that follows game.
  1. 1.
    One who, or that which, tracks or pursues, as a man or dog that follows game.
    “And of the trackers of the deer Scarce half the lessening pack was near.” Sir W. Scott.
  2. 2.
    In the organ, a light strip of wood connecting (in path) a key and a pallet, to communicate motion by pulling.(Mus.)