International Normalized Ratio, a blood test measuring clotting time, or Indian National Rupee, the currency of India.
Modern acronym with two distinct meanings: medical (1980s standardization of blood clotting tests) and economic (rupee from Sanskrit 'rupya' meaning silver coin).
The medical INR is crucial for patients on blood thinners like warfarin - too low and you risk clots, too high and you risk bleeding. Meanwhile, the Indian rupee's symbol ₹ was only adopted in 2010, making it one of the world's newest currency symbols.
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