tetromino
Falling block piece
A tetromino is a shape made of four squares joined edge to edge—the pieces in the video game Tetris.
There are seven distinct tetrominoes, typically named by the letters they resemble: I, O, T, S, Z, J, and L.
The term comes from combining "tetra" (four) with "domino."
Perpendicular pipe junction
- squareRhombus with right angles
- lineContinuous mark or queue
- zigzagAngled back-and-forth path
- rotationTurning on an axis
symmetry · tessellation · grid · tile · configuration · orientation · mirror
Multisided plane figure
- quadrilateralFour-sided closed figure
- vertexPoint where edges converge
- angleGeometric measure of rotation
- symmetryInvariance under transformation
congruence · plane · perimeter · area · convex · tiling · tessellation · coordinate
Treeless space in forest
- rotationTurning on an axis
- positioningArranging in specific locations
- back-to-backOccurring in direct succession
- comboItems grouped together
Arched passageway or gaming hall
- highscoreTop recorded result
- NintendoJapanese video game company
- wellDug water source
- playfieldDesignated gaming area
speedrun · marathon · sprint · ultra · level · cascade · NES
Challenging mental puzzle
- logicScience of valid reasoning
- patternRecurring arrangement or template
- packingPutting items in containers
- dissectionAnatomical cutting and examination
tangram · fitting · arrangement · solution · challenge
T-piece
Perpendicular pipe junction
rotation · symmetry · tessellation · grid · tile · configuration · orientation · mirror
polygon
Multisided plane figure
- quadrilateralFour-sided closed figure
- vertexPoint where edges converge
- angleGeometric measure of rotation
symmetry · congruence · plane · perimeter · area · convex · tiling · tessellation · coordinate · transformation
clearing
Treeless space in forest
- rotationTurning on an axis
- positioningArranging in specific locations
- back-to-backOccurring in direct succession
arcade
Arched passageway or gaming hall
playfield · speedrun · marathon · sprint · ultra · level · cascade · NES
brain-teaser
Challenging mental puzzle
- logicScience of valid reasoning
- patternRecurring arrangement or template
- packingPutting items in containers
dissection · tangram · fitting · arrangement · solution · challenge