Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An instrument that automatically detects and records the intensity, direction and duration of earthquakes and similar events.

from the GNU version of the Collaborative International Dictionary of English

  • n. An apparatus for registering the shocks and undulatory motions of earthquakes.

from The Century Dictionary and Cyclopedia

  • n. Same as seismometer (which see).
  • n. See seismometer. A great variety of apparatus has been devised for recording earthquake phenomena, of which that perfected by Omori is used in Japan, that of Milne is established at about fifty British and international stations, and that known as the Bosch-Omori, improved by Marvin, is used at about thirty American and German stations. All these are adaptations of the horizontal pendulum at first used by Zollner in 1860 to investigate changes in terrestrial gravity, and they record the horizontal movements of the ground at great distances from the origin of the earthquake. A very different apparatus for this purpose is the inverted vertical pendulum devised by Wiechert (see seismometer) and greatly improved by Marvin at Washington. No apparatus for recording vertical movements of the ground and none for recording the largest movements near the epicenter have as yet been successful.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake)

Etymologies

From seismo- + -graph. (Wiktionary)

Examples

  • 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.

    Heavy-Handed Politics

  • Gail Wynand, the man they called the seismograph of public opinion. "

    The Fountainhead

  • "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."

    The Wonder Island Boys: Exploring the Island

  • The third instrument is the seismograph, which is so arranged that it will accurately record the number, succession, direction, amplitude and period of successive oscillations.

    The San Francisco calamity by earthquake and fire

  • But is Britain really, as Garton Ash writes, a "seismograph" or "thermometer" of European “ American relations?

    Prudential

  • Of course, the five groups are unpopular with different segments of the population, which is precisely why together they provide a useful seismograph of tolerance in America.

    American Grace

  • And this seismograph traces an unambiguous picture, for on every single one of the fifteen questions tolerance increases significantly over these thirty-six years.51 Figure 13.9 summarizes the trends for each of the five groups averaging responses to speeches, teaching, and books in each case.

    American Grace

  • Art is a seismograph of experience which often reveals the common intersections within cultures.

    Carmen Zella: GERMANY on the STREETS of LA

  • Research shows the heart often beats erratically, spiking again and again like a seismograph during an earthquake.

    When Stress Is Good for You

  • But Oprah was acting as a kind of cultural seismograph for the return of that dread.

    How the End Begins

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