Please be sure to eat all the food that is recommended on the Nutrisystem meal plan. You could be at risk of health issues if you do not maintain a healthy diet. 1  If you're pregnant, you may not join the Nutrisystem program.  If you're a nursing mother, you may not join the Nutrisystem program.
Quick Answer. According to The Free Dictionary, etiology, also spelled aetiology, is the study of exploration of the cause or factors contributing to something. In pathology, it specifically denotes the investigation into the cause or origins of a disease.
1. : cause, origin; specifically: the cause of a disease or abnormal condition. 2. : a branch of knowledge concerned with causes; specifically: a branch of medical science concerned with the causes and origins of diseases. See etiology defined for kids.