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  1. n. A non-SI unit measuring electromagnetic flux density equal to 10-26 watts per square meter per hertz. The symbol for jansky is Jy.

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  • reesetee Use to measure the strength of radio signals from space. A jansky is a non-SI unit of electromagnetic flux density equivalent to 10−26 watts per square meter per hertz. Apr 20, 2009

‘jansky’ has been looked up 504 times, added to 4 lists, commented on 1 time, and has a Scrabble score of 20.