A conceptual or virtual node in network topology or data structures that doesn't physically exist but serves a structural purpose.
Compound of 'phantom' (from Greek 'phantasma' meaning apparition) and 'node' (from Latin 'nodus' meaning knot). Technical term combining the idea of something invisible yet functional with a connection point.
Phantom nodes beautifully illustrate how computer science borrows supernatural metaphors - these 'ghost' nodes exist logically but not physically, helping organize data structures like invisible assistants in the digital realm.
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