1. the study of causation or origination
Usage: formal; academic
2. the cause, set of causes, or manner of causation of a disease or condition
Usage: medical

Examples

• The aetiology of the disease remains unknown despite extensive research.
• Researchers are investigating the aetiology of autism spectrum disorders.
• The doctor explained the aetiology of the patient’s condition to the family.
• Understanding the aetiology of mental illness is crucial for effective treatment.
• The study focused on the aetiology of cardiovascular disease in young adults.
• Multiple factors contribute to the aetiology of diabetes.