Isopag definitions

isopag

isopag An equiglacial line connecting points where ice is present for approximately the same number of days in winter.
Found on http://www.wordinfo.info/words/index/info/view_unit/2795/7

---

isopag

a line drawn on a map connecting all points where ice exists at approximately the same period during winter.
Found on https://www.infoplease.com/dictionary/isopag

---