n.
Pronunciation: ' m ī -kr ə - ˌ s ī -z ə m
Function: noun
Etymology: International Scientific Vocabulary micr- + Greek seismos earthquake ― more at SEISMIC
Date: 1887
: a feeble rhythmically and persistently recurring earth tremor
– mi · cro · seis · mic \ ˌ m ī -kr ə - ' s ī z-mik, - ' s ī s- \ adjective
– mi · cro · seis · mic · i · ty \ -s ī z- ' mi-s ə -t ē , -s ī s- \ noun