Plinius (Moon)

Named after Gaius Plinius Secundus (The Elder) - Roman natural scientist (23-79).

Plinius is a prominent lunar impact crater on the border. South-southeast is the crater Ross, and to the northeast is Dawes. Just to the north is a system of rilles named the Rimae Plinius. At the northwest edge of the rille is the Promontorium Archeruia, a cape off the western rim that encloses the Mare Serenitatis. (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.