The noun anomaly means someone or something that is unusual enough to be noticeable or seem strange.

Synonyms are abnormality, inconsistency, oddity, or rarity.

The word origins in 1570. It comes from Latin (1660s) anomalia meaning “deviation from the common rule”, and from Greek anomalia meaning “inequality”. It is the abstract noun from anomalos meaning “uneven, irregular”. It is derived from an- meaning “not” plus homalos meaning “even”.

I noticed an anomaly in my blood test despite being healthy.

The mayor is not aware of the anomaly in their city.

The anomaly in politics is possible, especially for the greedy politicians.