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isohyet (eye-soh-HIGH-it) noun

A line drawn on a map connecting points that receive equal amounts of rainfall.

[Iso- + Greek huetos, rain.]

"In the 1860s, South Australians had been advised not to farm north of Goyder line, an isohyet that separated arable land from semi desert." Best, Daryl, Australia's Greentime history, History Today, 1 Oct 1997.

This week's theme: words from Greek.

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