polyominon.
/ˌpɒlɪˈɒmᵻnəʊ/, U.S. /ˌpɑliˈɑməˌnoʊ/ Geometry.
A planar shape formed by joining a number of identical squares by their edges.
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the world > space > shape > angularity > specific angular shape > [noun] > quadrilateral > square > figure or shape made up of squares
pentomino1954
polyomino1954
1954 Amer. Math. Monthly 61 675 We shall generalize the ‘domino’ to the ‘polyomino’... We define an n-omino as a simply-connected set of n squares of the checker-board which are ‘rook-wise connected’; that is, a rook placed at any square of the n-omino must be able to get to any other square, in a finite number of moves.
1972 W. F. Lunnon in R. C. Read Graph Theory & Computing 108 Free polyominoes whose symmetry groups contain no improper elements..are enantiomorphic.
1994 New Scientist 12 Nov. 49/2 Pentominoes are followed by hexominoes, heptominoes..n-ominoes... All may be found here under the generic name polyominoes.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1954