from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Deviation or departure from the normal or common order, form, or rule.
  • n. 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).
  • n. Astronomy The angular deviation, as observed from the sun, of a planet from its perihelion.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A deviation from a rule or from what is regarded as normal.
  • n. Something or someone that is strange or unusual.
  • n. Any event or measurement that is out of the ordinary regardless of whether it is exceptional or not.
  • n. Any of various angular distances.
  • n. A defect or malformation.
  • n. A failure of a classical symmetry due to quantum corrections.
  • n. An irregularity or disproportion.

from the GNU version of the Collaborative International Dictionary of English

  • n. Deviation from the common rule; an irregularity; anything anomalous.
  • n.
  • n. The angular distance of a planet from its perihelion, as seen from the sun. This is the true anomaly. The eccentric anomaly is a corresponding angle at the center of the elliptic orbit of the planet. The mean anomaly is what the anomaly would be if the planet's angular motion were uniform.
  • n. The angle measuring apparent irregularities in the motion of a planet.
  • n. Any deviation from the essential characteristics of a specific type.

from The Century Dictionary and Cyclopedia

  • n. Deviation from the common rule or analogy; something abnormal or irregular.
  • n. In astronomy, an angular quantity defining the position of a point in a planetary orbit, taken to increase in the direction of planetary motion.
  • n. In music, a small deviation from a perfect interval in tuning instruments with fixed notes; a temperament.
  • n. In mod. astron., the angle at the sun between perihelion and the place of a planet.
  • n. In meteorology, the amount by which a given observed quantity is greater or less than an assumed ideal or normal value; a departure.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. (astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun)
  • n. deviation from the normal or common order or form or rule
  • n. a person who is unusual


from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin anomalia, from Ancient Greek ἀνωμαλία (anomalia, "irregularity, anomaly"), from ἀνώμαλος (anomalos, "irregular, uneven"), negating the meaning of ὁμαλός (omalos).



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  • Pretty good usage here.

    October 23, 2008