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Definition of: seismograph
(sīz′mə·graf, -gräf, sīs′-) noun
An instrument for automatically recording the intensity, direction, and duration of an earthquake shock.
—seis′mo·graph′ic adjective
—seis·mog·ra·pher (sīz·mog′rə·fər, sīs-) noun
Vertical motion type.
a. Concrete base.
b. Clock.
c. Seismogram.
d. Stylus.
e. Weight.
f. Spring suspension.
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