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Rhomboid

Recurved

 

Rimmed depression

Having, or approximating, the shape of a rhombus. A rhombus is a parallelogram with all four sides of the same length. Used to describe the shape of a valve (example, Staurosirella rhomboides), a central area, or the girdle view of a frustule (example, Eunotia rhomboidea).


Alternative Term

rhombus