The Collaborative International Dictionary of English v.0.48:

Consanguine \Con*san"guine\, a.
   1. related by blood; descended from a common ancestor; --
      used as a term of relation between two people.

   Syn: akin(predicate), blood-related, cognate, consanguineous,
        kin(predicate).
        [PJC + WordNet 1.5]

   2. (Law) having the same father but different mothers; --
      contrasted with uterine[2] and german.
      [PJC]

WordNet (r) 3.0 (2006):

consanguine
    adj 1: related by blood [syn: akin(p), blood-related,
           cognate, consanguine, consanguineous,
           consanguineal, kin(p)]