n. (Wireless Teleg.) A device, one form of which consists of a scratched deposit of silver on glass, used in connection with the receiving apparatus for reading wireless signals. The electric waves falling on this contrivance increase its resistance several times. The anticoherer can be used in conjunction with a telephone. [ Webster 1913 Suppl. ]
n. (Elec.) Any device in which an imperfectly conducting contact between pieces of metal or other conductors loosely resting against each other is materially improved in conductivity by the influence of Hertzian waves; -- so called by Sir O. J. Lodge in 1894 on the assumption that the impact of the electic waves caused the loosely connected parts to cohere, or weld together, a condition easily destroyed by tapping. A common form of coherer as used in wireless telegraphy consists of a tube containing filings (usually a pinch of nickel and silver filings in equal parts) between terminal wires or plugs (called conductor plugs). [ Webster 1913 Suppl. ]
n. [ Pref. de- + coherer. ] (Elec.) A device for restoring a coherer to its normal condition after it has been affected by an electric wave, a process usually accomplished by some method of tapping or shaking, or by rotation of the coherer. [ Webster 1913 Suppl. ]
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