loss of appetite; reduced appetite; anorexia
Medical and everyday term for a decrease in the desire to eat. Can refer to a symptom or a condition.
I've had a loss of appetite due to a cold.
Loss of appetite in the elderly can lead to malnutrition.
食欲不振 is a more common and slightly broader term for poor appetite, while 食欲低下 emphasizes a measurable decrease.
拒食症 specifically refers to the eating disorder anorexia nervosa, whereas 食欲低下 is a general symptom.
Compound of 食欲 (appetite) and 低下 (decline, lowering).