Definitions for "Radiolarian"
A group of one-celled marine animals with a siliceous skeleton that occupies shallow portions of the water column. Radiolarians have a range from Cambrian to present.
Any actinopod animal belonging to the subclass radiolaria, characterized by a silica skeleton and dwelling in a marine pelagic environment.
A creature which lives inside a shell which is covered in spikes and spines
Keywords:  pertaining
Of or pertaining to the Radiolaria.
Keywords:  one
One of the Radiolaria.