A model or type of machinery or device which precedes the current (or later) one. Usually used to describe an earlier, outdated model.
One who precedes; one who has preceded another in any state, position, office, etc.; one whom another follows or comes after, in any office or position.
A vertex having a directed path to another vertex
A detached shoot or twig containing buds from a woody plant, used in grafting; a shoot or twig in a general sense.
A guardian.
A descendant, especially a first-generation descendant of a distinguished family.
The heir to a throne.