Is Shea Butter Considered An “oil”?

I was wondering if I should apply it to my hair while it is wet or dry.
I know oils should be applies while wet, but is Shea Butter considered and oil since it is solid and there does exist a “Shea Oil” version.
Shea Butter can be used on hair:
“Shea butter can be found in many [...] http://bit.ly/5UjaQg