isallotherm: Meaning and Definition of

is•al•lo•therm

Pronunciation: (ī-sal'u-thûrm"), [key]
— n. Meteorol.
  1. a line on a weather map or chart connecting points having equal temperature variations within a given period of time.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.