agnatic

from WordNet (r) 3.0 (2006)

agnatic
    adj 1: related on the father's side; "a paternal aunt" [syn:
           {agnate}, {agnatic}, {paternal}]

from The Collaborative International Dictionary of English v.0.48

Agnatic \Ag*nat"ic\, a. [Cf. F. agnatique.]
   Pertaining to descent by the male line of ancestors. "The
   agnatic succession." --Blackstone.
   [1913 Webster]