Cyrano is a lunar impact crater that lies on the far side. It lies due east of the huge walled plain Gagarin, and to the north of the somewhat smaller crater Barbier. The most notable aspect of this crater are the small impacts along the western and southwest rim, with the pear-shaped Cyrano P forming the later intrusion into the interior. The remainder of the rim has received some wear, and is particularly eroded at the northern end. (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.