TETRIS GLOSSARY
Tetromino
Also called Tetrimino · Tetramino · Tetrad · Piece
A shape made from four edge-connected squares. Tetris uses seven one-sided shapes: I, J, L, O, S, T and Z. Letter names avoid confusion when different games use different colors.
View in the A–Z glossary →
I
O
T
S
Z
J
L
Seven shapes. Four blocks in each.