anomaly
uh-NOM-uh-leenounMeaning something that departs from what is normal or expected
Memory hook NOT NORMALLY: a-NOM-aly. Sheep are not normally purple, so the one purple sheep in Omar’s flock is an anomaly.
A snowy day in Miami would be an anomaly.
In context The scientists at first thought the strange reading was an anomaly, a glitch in one machine, but every instrument recorded the same signal again the next night.
Similar oddity, exception, irregularity, abnormality
Opposite norm, rule, standard
From Greek anomalia, “unevenness”: an (not) + homalos (even).