资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.]

         The threefold distinction of profectitious,
         adventitious, and professional was ascertained.
                                                  --Gibbon.