WordReference Random House Unabridged Dictionary of American English © 2026
i•so•pec•tic
(ī′sə pek′tik),USA pronunciation n.
- Geology, Geographya line drawn on a map connecting all points where ice starts to form at approximately the same period at the onset of winter.
- Greek pēktikós freezing; see pectic
- iso- + -pectic