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.
Origin of isotac
Words nearby isotac
isosteric,
isosterism,
isosthenuria,
isostructural,
isosulfan blue,
isotac,
isotach,
isotactic,
isoteniscope,
isothere,
isotherm