Isopag
[ahy-suh-pag] /ˈaɪ səˌpæg/
noun
1.
a line drawn on a map connecting all points where ice exists at approximately the same period during winter.
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- Isopathy  isopathy i·sop·a·thy (ī-sŏp’ə-thē) n. 
- Isopectic  [ahy-suh-pek-tik] /ˌaɪ səˈpɛk tɪk/ noun 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. 
- Isopedin  [ahy-sop-i-din, ahy-suh-peed-n] /aɪˈsɒp ɪ dɪn, ˌaɪ səˈpid n/ noun, Ichthyology. 1. the underlying layer of a ganoid scale, composed of connective tissue embedded with bone. 
- Isopentyl  [ahy-suh-pen-til] /ˌaɪ səˈpɛn tɪl/ adjective, Chemistry. 1. . 
