Adjacent Words

microseism definitions

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WordNet (r) 3.0 (2005)

n
1: a small earthquake [syn: tremor, earth tremor, microseism]

Merriam Webster's

noun Etymology: International Scientific Vocabulary micr- + Greek seismos earthquake — more at seismic Date: 1887 a feeble rhythmically and persistently recurring earth tremor • microseismic adjective • microseismicity noun

Webster's 1913 Dictionary

Microseism Mi"cro*seism, n. [Micro- + Gr. ? an earthquake, fr. ? to shake.] A feeble earth tremor not directly perceptible, but detected only by means of specially constructed apparatus. -- Mi`cro*seis"mic, *seis"mic*al, a.