A person born with two heads is an example of an anomaly.
- departure from the regular arrangement, general rule, or usual method; abnormality
- anything anomalous
- Astron. a measurement used for any orbiting body, as a planet's angular distance around its orbit from its perihelion, taken as if viewed from the sun
Origin of anomalyClassical Latin anomalia from Classical Greek an?malia, inequality: see anomalous
- Deviation or departure from the normal or common order, form, or rule.
- One that is peculiar, irregular, abnormal, or difficult to classify: “Both men are anomalies: they have … likable personalities but each has made his reputation as a heavy” ( David Pauly )
- Astronomy The angular deviation, as observed from the sun, of a planet from its perihelion.
- A deviation from a rule or from what is regarded as normal.
- Something or someone that is strange or unusual.
- He is an anomaly among his friends.
- (sciences) Any event or measurement that is out of the ordinary regardless of whether it is exceptional or not.
- (astronomy) Any of various angular distances.
- (biology) A defect or malformation.
- (quantum mechanics) A failure of a classical symmetry due to quantum corrections.
- (dated) An irregularity or disproportion.
From Latin anomalia, from Ancient Greek ἀνωμαλία (anomalia, “irregularity, anomaly”), from ἀνώμαλος (anomalos, “irregular, uneven”), negating the meaning of ὁμαλός (homalos, “even”), from ὁμός (homos, “same”).