tectonic, a. [L. tectonicus, Gr. , fr. , , a carpenter, builder.].
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Of or pertaining to building or construction; architectural. [1913 Webster]
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Structural. [Webster 1913 Suppl.]
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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.]