Revenue passenger miles. Revenue passenger miles (or RPM) measures demand for air transport. Itâs calculated as the number of revenue passengers multiplied by the total distance traveled. Itâs also called airline âtraffic.â. An increase in RPM is positive for an airline company. It means that more passengers are using their service.
Definition. An armpit lump is a swelling or bump under the arm. A lump in the armpit can have many causes. These include swollen lymph nodes, infections, or cysts.
A pea sized lump in armpit usually means you have a swollen lymph node under arms. Your lymph nodes are parts of lymphatic system and fight off bacteria and infections. If you have noticed a lump developing in your armpit, don't panic. In most cases, this is nothing serious and it resolves on its own in a few days.