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aridity index

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noun
a number indicating how much more precipitation could be lost by evapotranspiration if it were available than is actually lost at a given location.
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THINGAMABOB OR THINGUMMY: CAN YOU DISTINGUISH BETWEEN THE US AND UK TERMS IN THIS QUIZ?
Do you know the difference between everyday US and UK terminology? Test yourself with this quiz on words that differ across the Atlantic.
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In the UK, COTTON CANDY is more commonly known as…

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