Found 2 items, similar to Microseism.
English → English (WordNet) Definition: microseism microseism n : a small earthquake [syn: tremor, earth tremor]
English → English (gcide) Definition: Microseism 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, Mi`cro*seis"mic*al, a. [Webster 1913 Suppl.]