Pronunciation: (tek-ton'ik), [key]
1. of or pertaining to building or construction; constructive; architectural.
a. pertaining to the structure of the earth's crust.
b. referring to the forces or conditions within the earth that cause movements of the crust.
c. designating the results of such movements: tectonic valleys.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.