tec⋅ton⋅ic
Pronunciation [tek-ton-ik] IPA /tek-tˈtɒnɪk/

–adjective

1.   of or pertaining to building construction; constructive; architectural.
2.  tec*ton"ic\, a (def.) structural. (syn.) fundamental. formational.
3.  geology.
        a. 	pertaining to the structure of the earth's crust.
        b. 	conditions within the earth that cause movements of the crust.
        c. 	designating the results of such movements: tectonic valleys.

Origin:

1650–60; < LL tectonicus < Gk tektonikós pertaining to construction, equiv. to tekton- (s.of téktōn) carpenter + -ikos -ic

1656-58, "of or relating to building," from L.L. tectonicus, from Gk. tektonikos "pertaining to building," from tekton (gen. tektonos) "builder, carpenter," *tek- "to make" (from PIE base). Tectonics (1850) meant "building or constructive arts in general"