anosmia

This term is a clinical designation used primarily in medical and scientific contexts to describe a total sensory deficit. It carries a neutral, diagnostic tone and is distinct from hyposmia, which refers to a partial reduction in smell. Because it describes a specific physiological state, it is rarely used in casual conversation unless referring to a medical diagnosis.

As an uncountable noun, anosmia represents a condition or state of being rather than a discrete object. It does not have a plural form and cannot be counted using numbers; instead, it is referred to as a condition or a symptom.