RADIOLARIANS
- A single-celled aquatic animal that has a spherical, amebalike body with a spiny skeleton of silica. Their skeletons can accumulate as a slimy deposit on the seabed
- RADIOLARIAN, any member of an order of marine Protozoa, or unicellular animals, with fine radial tentacles for feeding and movement [n]
- RADIOLARIAN [n]