The Collaborative International Dictionary of English v.0.48:

Conscript \Con"script\, a. [L. conscriptus, p. p. of conscribere
   to write together, to enroll; con- + scribere to write. See
   Scribe.]
   Enrolled; written; registered.
   [1913 Webster]

   Conscript fathers (Rom. Antiq.), the senators of ancient
      Rome. When certain new senators were first enrolled with
      the "fathers" the body was called Patres et Conscripti;
      afterward all were called Patres conscripti.
      [1913 Webster]