from The Century Dictionary.
- noun In musical instruments, as flutes, oboes, clarinets, etc., a hole in the side of the tube so placed that it may be closed by a finger of the player, that the tone produced may be modified in pitch.
Sorry, no etymologies found.
So down went her eye to the finger-hole again, but all she saw was the kitchen, with its sanded floor and bright turf fire, the key-beam with the nets hanging across it, and
So she made up her mind to knock and knock until those inside were obliged to come to the door, but first of all she thought she would have a peep in through the finger-hole by the latch.