1. occurring or existing without the presence of calculi (stones); relating to a condition not caused by or involving gallstones or kidney stones
Usage: medical; chiefly used in medical contexts to describe cholecystitis or other inflammatory conditions

Examples

• The patient was diagnosed with acalculous cholecystitis despite having no gallstones.
• Acalculous biliary disease can be difficult to diagnose because imaging may not reveal stones.
• The inflammation was acalculous in nature, suggesting an infectious or chemical cause.
• Acalculous pancreatitis accounts for approximately 10% of acute pancreatitis cases.