As I understand another = an + other, which has turned into a single word through the history of English. As a consequence, it refers to a single object (another car = one car, another bite = one bite). But I wasn't sure about the expression "Another four chickens". The expression sounds good to my ears, but bad to my (little) grammar knowledge.
My two questions are:
- Is it correct?
- If so, when can another be used for plural?