/ əˈnɒməli; NAmE əˈnɑːm-/ noun
( pl. -ies ) anomaly (in sth) a thing, situation, etc. that is different from what is normal or expected :
the many anomalies in the tax system
the apparent anomaly that those who produced the wealth, the workers, were the poorest
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WORD ORIGIN
late 16th cent.: via Latin from Greek anōmalia , from anōmalos , from an- not + homalos even.