Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A geoisotherm of equal mean summer temperature.

from the GNU version of the Collaborative International Dictionary of English

  • n. A line connecting points on the earth's surface having the same mean summer temperature.

from The Century Dictionary and Cyclopedia

  • n. An imaginary line over the earth's surface passing through points which have the same mean summer temperature.

Etymologies

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Examples

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