rhomboid
/ˈrɒmboʊɪd/; /ˌroʊmˈboʊɪd/Definitions
1. noun
A four-sided shape with all sides of equal length, where opposite angles are not right angles.
“The architect designed a rhomboid floor plan for the new office building.”
2. adjective
Having the shape of a rhombus, or resembling it.
“The rhomboid structure of the molecule was studied using X-ray crystallography.”