Final answer:
A 'macule' is the term for a flat spot or discoloration of the skin, like a freckle, distinct from other skin conditions such as pustules or cysts.
Step-by-step explanation:
The term for a fat spot or discoloration of the skin, such as a freckle, is macule. This is the correct term for a smooth spot of discoloration on the skin that is not raised. Unlike pustules, cysts, or stains, which represent other types of skin conditions or marks, a macule is flat and does not contain pus or fluid. Freckles are a type of macules characterized by an irregular accumulation of melanocytes, which may appear due to sun exposure. Moles are also masses of melanocytes but are usually larger than freckles and can be raised off the skin. It is important to monitor moles for changes that might indicate the presence of skin cancer, adopting the ABCD mnemonic for Asymmetry, Border irregularity, Color change, and Diameter increase