• synonyms


[koh-heer-er, -her-]
  1. a person or thing that coheres.
  2. Radio. a device usually used in detecting radio waves, as a tube filled with a conducting substance in granular form, whose electrical resistance increases when struck by radio waves.
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Origin of coherer

First recorded in 1890–95; cohere + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for coherer

Historical Examples

  • In all likelihood, the coherer is acted upon in the same way.

    Little Masterpieces of Science:


  • Then, suddenly, came the sharp click of the “tapper” as it struck the “coherer.”

    Historic Inventions

    Rupert S. Holland

  • In Marconi's first instruments he used a device called the "coherer."

  • The coherer may be said to resemble an engine-driver, and the “relay” an engine.

  • One wire from the coherer is connected to the aerial and the other to the ground.

    ABC of Electricity

    William Henry Meadowcroft

British Dictionary definitions for coherer


  1. physics an electrical component formerly used to detect radio waves, consisting of a tube containing loosely packed metal particles. The waves caused the particles to cohere, thereby changing the current through the circuit
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012