1. of, relating to, or involving a nephridium (a tubular excretory organ in invertebrates)
Usage: biology; technical

Examples

• The nephridial system in earthworms functions similarly to kidneys in vertebrates.
• Researchers examined the nephridial ducts under a microscope to study the organism's excretion.
• Many aquatic invertebrates rely on nephridial structures for osmoregulation.
• The nephridial openings, called nephridiopores, allow waste to exit the body.