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1. An initialism of "now known as." Often spelled with lowercase letters. After Boogle Co. merged with former rival MacroSoft, the two companies are nka "MacroBoogle Inc." A: "Hello, does anyone on this forum know where to find EverLast Car Batteries?" B: "I know a website that sells them, but they're NKA EverSure Batteries."
2. medical jargon An initialism of "no known allergies." Patient is male, 26, diabetic, NKA.
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