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isanomal

[ahy-suh-nom-uh l]
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noun Meteorology.
  1. a line on a map or chart connecting points having an equal anomaly of a meteorological quantity.
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Compare isabnormal.

Origin of isanomal

1880–85; is- + -anomal, back formation from anomalous
Related formsis·a·nom·a·lous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018