seismic

• POS: Adjective
• HYPHEN: seis=mic

CIDE DICTIONARY

seismic, a. [Gr. seismo`s an earthquake, from sei`ein to shake.].

 Of or pertaining to an earthquake; caused by an earthquake.  [1913 Webster]

Seismic vertical, the point upon the earth's surface vertically over the center of effort or focal point whence the earthquake's impulse proceeds, or the vertical line connecting these two points.

OXFORD DICTIONARY

seismic, adj. of or relating to an earthquake or earthquakes.

Derivative

seismal adj. seismical adj. seismically adv.

Etymology

Gk seismos earthquake f. seio shake