What is the equivalent of European "seminar" in US universities? At my Czech university where I study computer science (but I believe math and physics are organized the same way here), most courses have both lectures (professor presenting the topic to a large class) and "seminars" (TA giving exercises and homework to a smaller class).

I believe courses at US universities have different structure and that the term "seminar" has different meaning. But there has to be something like our "seminars", right? What is it called? How does it look like?
This is often called a "recitation section".