Definition of "seismology" [seis•mol•o•gy]

• The geophysical science of earthquakes and the mechanical properties of the earth. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "And we have seen quantum improvements in seismology as well as in directional and horizontal drilling, under-sea pipeline construction to name just a few."
• "His phobia about earthquakes-how can they call seismology a science?"
• "It's a freeware game about reflection seismology, which is imaging underground structures by sending soundwaves into the ground and interpreting the echos."