The siliceous, box-like cell wall of diatoms.
The siliceous covering of a diatom cell, consisting of two valves, an epivalve (top) and hypovalve (bottom) and their associated cingulum elements
The siliceous components of a diatom cell; i.e. the valves and girdle bands
The mineral "skeleton" of a diatom or other unicellular organism.
An entire diatom shell. It consists of an epitheca and hypotheca (or an epivalve, girdle and hypovalve).