I always thought that if it was a single row, it was a clip and if it has a staggered row like a Mini 14 has, then it is a magazine. Am I wrong?
You're wrong. Magazines come in single and double stack format. They also come in spiral "drum" formats. The drum is a single stack wrapped into a large spiral. Magazines also come in tubular format with the cartridges lined up "nose to tail". This is common in lever action rifles and some older rim fire .22LR rifles. If you have a tubular magazine, you must never load it with "spitzer" (pointed) bullets. You employ a flat nose bullet to avoid having the bullet nose igniting the primer of the adjacent round. If one goes off, they pretty much all go off.