Source : Webster's Revised Unabridged Dictionary (1913)

Agnatic \Ag*nat"ic\, a. [Cf. F. agnatique.]
   Pertaining to descent by the male line of ancestors. ``The
   agnatic succession.'' --Blackstone.

Source : WordNet®

agnatic
     adj : related on the father's side; "a paternal aunt" [syn: {agnate},
            {paternal}]