Source : Webster's Revised Unabridged Dictionary (1913)

Connascence \Con*nas"cence\, Connascency \Con*nas"cen*cy\, n.
   [L. con- + nascentia birth, fr. nascens, p. pr. of nasci to
   be born.]
   1. The common birth of two or more at the same tome;
      production of two or more together. --Johnson.

   2. That which is born or produced with another.

   3. The act of growing together. [Obs.] --Wiseman.