There seems to be some debate on which word is which.
It has to do with parent-child relationships between objects and what happens to children when you delete the parent.
One scenario says that children have no life outside that of their parent, so they should be deleted when the parent is deleted. Think "DELETE CASCADE" in foreign keys and relational databases.
The other scenario says that children should persist beyond their parents, so they should not be deleted when their parent is deleted.
I'll leave it to others to argue which word describes each situation.
