1. Small, dark worms found in glacial ice, typically in Alaska and other cold regions; they are believed to feed on algae and organic matter within the ice.
Usage: Usually plural; also called glacier worms; Scientific interest; relatively obscure subject

Examples

• Researchers discovered iceworms living deep within Alaskan glaciers.
• The iceworms migrate vertically through the ice layers each day.
• Scientists study iceworms to understand life in extreme environments.
• Iceworms are among the few organisms adapted to survive in glacial ice.