aberrator
n. C2 Proficiency aber·ra·tor
n. a person or thing that behaves in a strange or wrong way. It is a formal word used to describe someone who is not normal or follows the rules.
n. a person or thing that deviates from the normal or expected pattern of behavior. Often used in formal or scientific contexts to describe anomalies or outliers.
The scientist studied the aberrator to understand the error.
In a group of otherwise healthy patients, the aberrator showed symptoms that were completely different from the rest.
The committee identified the lone aberrator in the data set, whose results were so far from the mean that they suggested a fundamental flaw in the measurement process.