The Collaborative International Dictionary of English v.0.48:

Consertion \Con*ser"tion\, n. [L. consertio, fr. conserere,
   -sertum to connect; con- + serere to join.]
   Junction; adaptation [R.]
   [1913 Webster]

         Consertion of design, how exquisite.     --Young.
   [1913 Webster]