Source : Webster's Revised Unabridged Dictionary (1913)

Cousin-german \Cous"in-ger"man\ (-j?r"man), n. [Cousin + german
   closely akin.]
   A first cousin. See Note under {Cousin}, 1.

Source : WordNet®

cousin-german
     n : the child of your aunt or uncle [syn: {cousin}, {first
         cousin}, {full cousin}]