Geras was the god of old age in Greek mythology, the son of Nyx, goddess of the night, and Erebos, god of darkness. Geras was considered a virtue, as the more geras a person acquired, the more fame and excellence they were considered to have. The opposite of Geras was Hebe, the goddess of youth. He was thought to be a shriveled-up old man.
Geras Is also called Senectus, Giras.