Dictionary.net

• Symbiotic green Algae (Protococcaceae) living in various groups of the Protozoa, e.g. Sarcodina, Radiolaria.

1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.

• [Greek] Symbiotic green Algae (Protococcaceae) living in various groups of the Protozoa, e.g. Sarcodina, Radiolaria (biol.).

1920 - A dictionary of scientific terms (6th edition)
By J.H. Kenneth