Dictionary
is•ab•nor•mal
Pronunciation: (ī"sab-nôr'mul), [key]—
n. Meteorol.
a line on a map or chart connecting points having an equal deviation from the normal value of some meteorological quantity, as temperature.
Also,isoabnormal.Cf.
isanomal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.