Definition of "seismograph" []

• An instrument for automatically detecting and recording the intensity, direction, and duration of a movement of the ground, especially of an earthquake. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The point we are making here is that if we regard the equity markets as a long-term seismograph of the economy, then so far, despite all the storm and stress, the markets - and therefore the economy - remain within the general pattern of the 2000-2002 market at the 2001 recession."
• "Gail Wynand, the man they called the seismograph of public opinion. ""
• ""There is an instrument called the seismograph, which records the vibratory movements of the earth, and also locates the distances at which the shocks are from the observer, but there is nothing to indicate what the extent and probable dangers are.""