Hesselholt in the K-theory handbook: Def of … Alternative definition: The homology groups of the category of finitely generated projective -modules, with coefficients in the bifunctor . (Jibladze-Pirashvili)
arXiv: Experimental full text search
CT (Category theory)
Possibly related: http://mathoverflow.net/questions/44243/group-cohomology-and-cohomology-in-non-abelian-categories
nLab page on Cohomology of algebraic theories