tetromino
(tɛˈtrɒmɪnəʊ)
[f. tetra- + domino by deliberately false analogy: see quot. 1961.]
Any of the five distinct planar shapes that can be formed by joining four identical squares by their edges.
| 1954 S. W. Golomb in Amer. Math. Monthly LXI. 678 The checker board cannot be covered with 15 L-tetrominoes and one square tetromino. 1961 [see pentomino]. 1979 Sci. Amer. Apr. 19/1 It is when we turn to the 4-cell animals (the tetrominoes) that the project really becomes interesting. |