Which term denotes a loss of appetite?

Anorexia is the term that specifically denotes a loss of appetite. This condition can occur for various reasons, including psychological factors (such as stress or eating disorders), physical ailments, or side effects of medications. It is important to differentiate this term from others in the list.

Antispasmodic refers to medications used to relieve spasms in muscles, particularly the smooth muscles of the gastrointestinal tract, and does not relate to appetite directly. Anemia is a condition characterized by a deficiency of red blood cells or hemoglobin, which can lead to fatigue and weakness but is not primarily associated with appetite. Aphasia is a communication disorder that affects a person’s ability to process language, and it does not pertain to appetite either. Thus, the precise and medical definition of anorexia encompasses the concept of loss of appetite, making it the correct term for this question.