tectonic

from WordNet (r) 3.0 (2006)

tectonic
    adj 1: pertaining to the structure or movement of the earth's
           crust; "tectonic plates"; "tectonic valleys"
    2: of or pertaining to construction or architecture [syn:
       {tectonic}, {architectonic}]

from The Collaborative International Dictionary of English v.0.48

Tectonic \Tec*ton"ic\, a. [L. tectonicus, Gr. ?, fr. ?, ?, a
   carpenter, builder.]
   1. Of or pertaining to building or construction;
      architectural.
      [1913 Webster]

   2. (Biol.) Structural.
      [Webster 1913 Suppl.]

   3. (Geol. & Phys. Geog.) Of, pert. to, or designating, the
      rock structures and external forms resulting from the
      deformation of the earth's crust; as, tectonic arches or
      valleys; tectonic plates.
      [Webster 1913 Suppl. +PJC]