The Collaborative International Dictionary of English v.0.48:

Deuterocanonical \Deu`ter*o*ca*non"ic*al\, a. [Gr. ? second + E.
   canonical.]
   Pertaining to a second canon, or ecclesiastical writing of
   inferior authority; -- said of the Apocrypha, certain
   Epistles, etc.
   [1913 Webster]