The Collaborative International Dictionary of English v.0.48:

Telegony \Te*leg"o*ny\, n. [Gr. th^le far + root of Gr. ? to be
   born.] (Biol.)
   The supposed influence of a father upon offspring subsequent
   to his own, begotten of the same mother by another father. --
   Te*leg"o*nous, a.
   [Webster 1913 Suppl.]