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seismometer [seismometers]▼◼◼◼noun[UK: saɪzmˈɒmɪtə] [US: saɪzmˈɑːmɪɾɚ]
seismograph [seismographs]▼◼◼◻noun[UK: ˈsaɪz.mə.ɡrɑːf] [US: ˈsaɪz.mə.ɡræf]
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