1) Desmid 1) Genus desmidium 2) Protoctist genus 
Desmidium is one of the filamentous desmid genera characterized by rather firm intercellular connections. Cells connect to adjoining cells at the flat, apical face of the cells. The cells can be longer or shorter than wide. A median constriction of the cells may appear either as distinct or faint. Desmidium cell walls are smooth with multiple side...
[n] - a genus of protoctista
genus Desmidium noun a genus of protoctist