From Citizendium, the Citizens' Compendium
Parent : An adult human such as a mother or father or stepmother or stepfather or adoptive parent who cares for their children or offspring, particularly when they are young and growing up. But the parent–child relationship can last a lifetime. The duty of a parent is to provide protection, shelter, food, education, care, medical attention when necessary, and perform other tasks and chores to ensure the safety and care and well-being of the child. For example, in Greek mythology, the parent of the hero Aeneas was Anchises, but when time passed, the son carried the lame and aged father out of the burning city of Troy, and the roles were reversed, since the son cared for the father.