isopectic: Meaning and Definition of

i•so•pec•tic

Pronunciation: (ī"su-pek'tik), [key]
— n.
  1. a line drawn on a map connecting all points where ice starts to form at approximately the same period at the onset of winter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.