Tetromino

A tetromino, is a polyomino made of four square blocks. The seven one-sided tetrominoes are I, O, T, S, Z, J, and L.

The spelling "tetromino" is standard among mathematicians. The Tetris Company had preferred tetramino around 1999 and has used tetrimino since 2001.

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Multimino

In The Next Tetris, Sticky mode of Tetris Worlds and Tetris Mania, and Jewelry Master, some tetrominoes are multiminoes, that is, the tetromino itself is divided into visible components. Though the tetromino is moved and rotated as a unit, once it locks, the components separate by colors and fall.

See also

• Piece
• Orientation

External links

• Mathworld
• Wikipedia:Tetromino
• The Tetris Taxonomy: The Pieces (Adult audience)