Rhomboid

Recurved

 

Rimmed depression

A rhombus is a geometric shape, a type of parallelogram. The opposite sides of a parallelogram are equal in length, while a rhombus is a type of parallelogram with all four sides of the same length. Diatom valves, or their central area, may be described as similar to a rhombus, or rhomboid.


Alternative Term

rhombus