Is my grandmother's brother's son my "cousin" or is there another word for such a relative?

http://en.wikipedia.org/wiki/File:Cousin_tree_%28with_genetic_kinship%29.png
Also I googled “cousin” and found this image. From this, I think that my relative may be my first cousin once removed, but I am not entirely sure.

http://www.wolframalpha.com/input/?i=grandmother%E2%80%99s+brother%E2%80%99s+son
Your grandmother’s brother’s son is your cousin once removed, as you suspected.
that link has some other interesting info on it =)

Oh, wonderful.
Thanks LocoLuke :)
In fact this app will be very useful, I was never very good at this family tree-naming business.

I love that website, it’s awesome for random stuff like this. It’s good at different stuff than google, but i use them about equally.

Second cousin.

Not second cousin. Second cousins are the children of first cousins. When the relationship crosses a generational line, it is “once removed.”

Your grandmother’s brother’s son would be the first cousin of your parent. You are the child of his first cousin (your parent), and hence you are a first cousin once removed.

Thank you all for your answer, really clears things up :)