1. Plural of heliozoan; a group of single-celled aquatic organisms (protozoans) characterized by radiating pseudopodia and a spherical body shape, commonly found in freshwater environments.
Usage: scientific/biological term; also called sun animalcules

Examples

• Heliozoans are microscopic organisms that feed on bacteria and small algae.
• Under the microscope, heliozoans appear as tiny spheres with delicate radiating spines.
• The heliozoans in the pond sample were identified by their characteristic sun-like appearance.
• Biologists study heliozoans to understand the diversity of freshwater protozoans.
• Heliozoans use their pseudopodia to capture and consume food particles.