anomaly
something that does not fit the expected pattern
Root
- anom / anomaly: irregular, uneven, or outside the expected pattern
Other words with the anom / anomaly root
- anomalous: deviating from what is normal
An anomaly is the odd dot outside the pattern.
The data looked stable except for one anomaly near the end.
Anomaly is the better doorway into anomalous. Keep the pattern image: something is uneven, irregular, or outside what the mind expected.