Final answer:
Unilateral in medical terminology means pertaining to one side of the body only, which is vital for precisely describing locations or sides affected in medicine.
Step-by-step explanation:
The medical term unilateral means pertaining to one side of the body only. This term is frequently used in anatomy and medicine to describe symptoms, conditions, or treatments that affect only one side of the body, as opposed to bilateral, which means affecting both sides. Directional terms like unilateral are critical for physicians and anatomists to describe the precise location or side of the body when referencing organs, injuries, or medical conditions.