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anomaly

UK/əˈnɒm.ə.lɪ/US/əˈnɑ.mə.li/
nounC1Common in everyday speech and writing · #7,571 of 15,258neutral

Other forms: anomalies

An anomaly is the one thing that does not fit the pattern. A statistical anomaly, dismiss it as an anomaly, a temperature anomaly.

In science an anomaly is where discovery starts: the orbit of Mercury was an anomaly until relativity explained it. In climate data, an anomaly is a difference from a long-term average, which is a purely technical use with no sense of strangeness. Dismissing something as an anomaly is a way of not investigating it. Note anomalous; and that the word means literally not even.

Definitions of anomaly

  1. 1nounanomalyThe one thing that does not fit the pattern.C1

    “Last year's warm winter was an anomaly; normally the lake freezes by December.”

anomaly is an irregularity.

Also accepted in games: irregularity

Where it comes from

Greek anomalia is an- plus homalos, even, from homos, same. An anomaly is literally something not level with the rest.

  1. Proto-Indo-European

    *sem-

  2. Latin

    anōmalia

  3. English, today

    anomaly

Built from

  • ἀνώμαλος · Ancient Greek — irregular, uneven
  • ὁμαλός · Ancient Greek — even
  • ὁμός · Ancient Greek — same

Learned borrowing from Latin anōmalia. From Latin anomalia, from Ancient Greek ἀνωμαλία (“irregularity, anomaly”), from ἀνώμαλος (“irregular, uneven”), negating the meaning of ὁμαλός (“even”), from ὁμός (“same”).

Etymology from Wiktionary, CC BY-SA

Practised in Big Ideas

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anomaly in the wild

  • The gravity anomaly at a location on the Earth's surface is the difference between the observed value of gravity and the value predicted by a theoretical model.

    Gravity anomaly

  • For example, a mass of dense ore below the surface will give a positive anomaly due to the increased gravitational attraction of the ore.

    Gravity anomaly

  • The Norwegian spiral anomaly of 2009 was a light phenomenon that appeared in the night sky over Norway in the morning of 9 December 2009.

    2009 Norwegian spiral anomaly

From Wikipedia, CC BY-SA 4.0. These sentences were written by other people about their own subjects; they are here to show the word at work, not as anybody’s opinion.