a unit of currency in Georgia, one hundredth of a lari

A puzzle video game in which falling tetrominoes must be manipulated to form complete lines, which are then cleared from the grid.

(video games, by extension) The act of clearing four lines at once (the maximum possible) in Tetris.

The effect of seeing hallucinatory images of a repetitive activity done earlier.

(video games) A system of inventory management where acquired items must be arranged according to the space that they consume.

Alternative letter-case form of inventory Tetris

(geometry) A polyiamond made up of four triangles.

plural of tetriamond

(obsolete) Morose, bitter.

(chemistry) Denoting a kind of acid.