Raman is a small lunar crater that lies on the western edge of a plateau feature in the expansive lunar mare named Oceanus Procellarum. It shares this plateau with the lava-flooded Herodotus and Aristarchus to the southeastern. To the northeast is the small peak named Mons Herodotus. To the northwest on the mare is the long, narrow range named the Montes Agricola. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.