The Collaborative International Dictionary of English v.0.48:

Cor- \Cor-\ (k[o^]r-).
   A prefix signifying with, together, etc. See Com-.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cor \Cor\ (k[^o]r), n. [Heb. k[=o]r.]
   A Hebrew measure of capacity; a homer. [Written also core.]
   [1913 Webster]