The Collaborative International Dictionary of English v.0.48:

Architectonic \Ar`chi*tec*ton"ic\, Architectonical
\Ar`chi*tec*ton"ic*al\, a. [L. architectonicus, Gr. ?. See
   Architect.]
   1. Pertaining to a master builder, or to architecture;
      evincing skill in designing or construction; constructive.
      "Architectonic wisdom." --Boyle.
      [1913 Webster]

            These architectonic functions which we had hitherto
            thought belonged.                     --J. C.
                                                  Shairp.
      [1913 Webster]

   2. Relating to the systemizing of knowledge.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Architectonic \Ar`chi*tec*ton"ic\, n. [Cf. F. architectonique.]
   1. The science of architecture.
      [1913 Webster]

   2. The act of arranging knowledge into a system.
      [1913 Webster]

WordNet (r) 3.0 (2006):

architectonic
    adj 1: of or pertaining to construction or architecture [syn:
           tectonic, architectonic]