At https://science.slashdot.org/comments.pl?sid=14838212&cid=59217186 I read this sentence
Insulin back then was obtained by grinding up a pancreas of a pig or a core and purifying the insulin contained in it.
What is a core in this context? I looked it up on Wikipedia https://en.wikipedia.org/wiki/Core but the only entry under biology was Core (anatomy), everything except the appendages.
I can't imagine it is a misspelling (Of what, dog? Cow?)