anomalous
adj. C1 Advanced US //əˈnɑməɫəs// UK //ɐnˈɒmələs// anoma·lous
adj. different from what is normal or expected. You use this to describe something that stands out because it does not fit with the rest of a group.
adj. deviating from what is standard, normal, or expected. Often used to describe data points or physical objects that do not conform to a general pattern.
The anomalous result made the scientists look at their data again.
The researcher noted an anomalous spike in temperature that did not match the rest of the month's weather patterns.
While the majority of the samples followed the expected distribution, the anomalous data point suggested a fundamental flaw in the initial hypothesis regarding the chemical reaction.
From Late Latin anōmalos, from Ancient Greek ἀνώμᾰλος (anṓmălos).