D defs.my
Entry 3 senses Webster, 1913

Tectonic

/tĕk-tän'-ĭk/ · Tec·ton·ic · IPA /tɛktˈɑnɪk/
01 a. Of or pertaining to building or construction; architectural.
  1. 1.
    Of or pertaining to building or construction; architectural.
  2. 2.
    Structural.(Biol.)
  3. 3.
    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.(Geol. & Phys. Geog.)