isotac
[ ahy-suh-tak ]
/ ˈaɪ səˌtæk /
noun
a line drawn on a map connecting all points where ice starts to melt at approximately the same period in spring.
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Origin of isotac
Words nearby isotac
isosteric, isosterism, isosthenuria, isostructural, isosulfan blue, isotac, isotach, isotactic, isoteniscope, isothere, isotherm
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020