Any device in which an imperfectly conducting contact betweenpieces of metal or other conductors loosely resting against eachother is materially improved in conductivity by the influence ofHertzian waves; -- so called by Sir O. J. Lodge in 1894 on theassumption that the impact of the electic waves caused the looselyconnected parts to cohere, or weld together, a condition easilydestroyed by tapping. A common form of coherer as used in wirelesstelegraphy consists of a tube containing filings (usually a pinch ofnickel and silver filings in equal parts) between terminal wires orplugs (called conductor plugs).
* These videos are coming directly from Youtube, they may or may not be most relevant to the word "Coherer"
What is Define Dictionary Meaning?
Best thing is, its free and you can even contribute without creating an account.