different between tapping vs blockhole

English

tapping (plural tappings)

An act of making a light hit or strike against something.
- 1897, Bram Stoker, Dracula Chapter 20
  As he was speaking there was a soft tapping at the door. I went over and opened it […]
(music) A guitar technique in which the strings are tapped against the fingerboard
The process by which a resource is tapped or exploited.
- 1938, Paul Burke Jacobs, Harry Paul Newton, Motor Fuels from Farm Products (page 99)
  Competitive tappings of a common oil pool can lead only to waste and overproduction, unless rigidly regulated […]
(electrical engineering) A connection made to some point between the end terminals of a transformer coil or other component.

tapping

block +? hole.

blockhole (plural blockholes)

(cricket) A small depression in the pitch caused by batsmen tapping their bats on the point where they have taken block.
(by extension) The approximate place where the toe of the bat touches the pitch when a batsman is taking guard.

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