cat's whisker

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cat's whisker

n
1. (Electronics) a pointed wire used to make contact with the crystal in a crystal radio receiver
2. (Electronics) any wire used to make contact with a semiconductor
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014