The Collaborative International Dictionary of English v.0.48:

German \Ger"man\, a. [OE. german, germain, F. germain, fr. L.
   germanus full, own (said of brothers and sisters who have the
   same parents); akin to germen germ. Cf. Germ, Germane.]
   Nearly related; closely akin.
   [1913 Webster]

         Wert thou a leopard, thou wert german to the lion.
                                                  --Shak.
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   Brother german. See Brother german.

   Cousins german. See the Note under Cousin.
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The Collaborative International Dictionary of English v.0.48:

Brother german \Broth"er ger"man\ (Law)
   A brother by both the father's and mother's side, in
   contradistinction to a uterine brother, one by the mother
   only. --Bouvier.
   [1913 Webster]