The Collaborative International Dictionary of English v.0.48:
Cousin-german \Cous"in-ger"man\ (-j?r"man), n. [Cousin + german closely akin.] A first cousin. See Note under Cousin, 1. [1913 Webster]WordNet (r) 3.0 (2006):
cousin-german n 1: the child of your aunt or uncle [syn: cousin, first cousin, cousin-german, full cousin]