A solid disk or cylinder that fits inside a hollow cylinder, and moves under pressure (as in an engine) or displaces fluid (as in a pump)
A valve device in some brass instruments for changing the pitch
To move up and down or in and out like a piston.
Sheets of tin or other plate which run below the gauge.
A person who writes graffiti using a specific mark
The player who tries to catch others in the game of tag.
A device for removing taglocks from sheep.
A program or algorithm that adds tags for purposes of categorization, e.g. grammatical information to words in a document, or genres to songs in a music collection.
That which is pointed like a tag.
The penis.