Definition of "coherer" []

• A detector of radio waves used in very early radio receivers (noun)

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• "The name coherer comes from the first practical instrument made for this purpose."
• "The tube of filings through which the electric current is made to pass in wireless telegraphy is called a coherer signifying that the filings cohere or cling together under the influence of the electric waves."
• "The instrument for this purpose is called a coherer, in which small particles cohere through the action of the electric waves, and are caused to fall apart mechanically, during the electrical impulses."