What is a Tetris piece called?

A Tetris piece is called a Tetromino. A Tetromino is a geometric shape composed of four squares, all joined together. These shapes come in various combinations and are the building blocks used to create the gameplay of Tetris. Tetrominos can be rotated and moved horizontally in a grid, allowing players to strategically place them to complete full rows and eliminate them from the playing field. The term Tetromino is derived from the Greek prefix "tetra," meaning four, and the term "dominos," referring to rectangular tiles often used in games.