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non-rectangular
non-rectangular adj.
Brit. 
/ˌnɒnrɛkˈtaŋɡjᵿlə/
, /ˌnɒnrɛkˈtaŋɡjᵿlə/U.S. /ˌnɑnˌrɛkˈtæŋɡjələr/
/ˌnɑnˌrɛkˈtæŋɡjələr/ΚΠ
1789 T. Taylor tr. Proclus Philos. & Math. Comm. II. 181 That which is rectangular, is shewn to be greater than that which is non-rectangular.
1917 Science 13 July 46/2 Electrical capacity of similar, non-parallel plane plates, and its application where the plates are non-rectangular.
1992 Workstation News Sept. 25/4 eXodus supports the shapes extension for drawing non-rectangular windows.
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