The Collaborative International Dictionary of English v.0.48:

Profectitious \Pro`fec*ti"tious\, a. [L. profectitius, fr.
   proficisci to set out, proceed.]
   Proceeding from, as from a parent; derived, as from an
   ancestor. [R.]
   [1913 Webster]

         The threefold distinction of profectitious,
         adventitious, and professional was ascertained.
                                                  --Gibbon.
   [1913 Webster]