anallagmatic
/ˌanəlaɡˈmatɪk/Mathematics
adjective
1Of a surface or curve: not changed in form by inversion.
- Examples of anallagmatic curves are the cardioid and the Cartesian oval..
2Of a tessellation in which the cells are of one or other of two colours: such that placing any two columns, or any two rows, side by side results in half the adjacent cells having the same colour and half having different colours.
Origin
Mid 19th century. From an- + ancient Greek ἀλλαγματ-, ἄλλαγμα something given in exchange + -ic, after French anallagmatique.