What is the term for an abnormal paleness or lack of color in the skin?

The term that refers to an abnormal paleness or lack of color in the skin is "pallor." This condition can occur for various reasons, including medical issues such as anemia, shock, or certain diseases that affect blood flow or oxygenation. When someone exhibits pallor, it usually indicates that there may be an underlying health concern that needs further investigation.

In context, "paranoia" refers to a mental health condition characterized by irrational fears or suspicion, which does not relate to skin color. "On the nod" describes a state of drowsiness or stupor often associated with substance use, especially opioids. "Nystagmus" is a medical term that describes involuntary eye movement and is related to neurological or vestibular function, rather than skin appearance. Thus, the correct choice, "pallor," is clearly defined in the context of skin color and health.