/ Dictionary / Index I isanomal: Meaning and Definition of Find definitions for: is•a•nom•al Pronunciation: (ī"su-nom'ul), [key] — n. Meteorol. a line on a map or chart connecting points having an equal anomaly of a meteorological quantity. Cf. isabnormal. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isandrous isanthous Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language