Meaning of isodrosotherm

i•so•dros•o•therm

Pronunciation: (ī"su-dros'u-thûrm"), [key]
— n. Meteorol.
  1. a line on a weather map or chart connecting points having an equal dew point.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.