DRILL n.
. See under Bow, Breast. -- Cotter drill, or Traverse drill, a machine tool for drilling slots. -- Diamond drill. See under Diamond. -- Drill jig. See under Jig. -- Drill pin, the pin in a lock which enters the hollow stem of the key. -- Drill sergeant (Mil.), a noncommissioned officer whose office it is to instru…
FINGER n.
inger. -- Finger alphabet. See Dactylology. -- Finger bar, the horizontal bar, carrying slotted spikes, or fingers, through which the vibratory knives of mowing and reaping machines play. -- Finger board (Mus.), the part of a stringed instrument against which the fingers press the strings to vary the tone; the keybo…
FORELOCK n.
A cotter or split pin, as in a slot in a bolt, to prevent retraction; a linchpin; a pin fastening the cap-square of a gun. Forelock bolt, a bolt retained by a key, gib, or cotter passing through a slot. -- Forelock hook (Rope Making), a winch or whirl by which a bunch of three yarns is twisted into a standard. Knight.…