Dictionary.com
definitions
  • synonyms

isabnormal

[ahy-sab-nawr-muh l]
noun Meteorology.
  1. a line on a map or chart connecting points having an equal deviation from the normal value of some meteorological quantity, as temperature.
Show More
Also isoabnormal.
Compare isanomal.

Origin of isabnormal

First recorded in 1850–55; is- + abnormal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018