Plural of toman, the basic currency unit of Iran consisting of ten rials.
From Persian tūmān, originally a monetary unit in medieval Islamic states. The word likely derives from Mongolian tumän (ten thousand), reflecting its historical value. It evolved into modern currency terminology across Persian-speaking regions.
The toman shows how languages preserve economic history—the word 'tumän' meant 10,000 in Mongolian, and when Persians adopted the monetary concept during the Mongol era, they kept the name even as its value changed over centuries. It's like how 'dollar' comes from a specific silver coin but now means various currency units worldwide.
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