In Jungian analytical psychology, examples of the senex archetype in a positive form include the wise old man or wizard. The senex may also appear in a negative form as a devouring father (e.g. Ouranos, Cronus) or a doddering fool.
The antithetical archetype, or enantiodromic opposite, of the senex is the Puer Aeternus.
Senex is also the name of a wise old fara, a subcellular creature inside a mitochondrion, in the novel A Wind in the Door by Madeleine L'Engle (1973, ISBN 0-374-38443-6).
Sir Alan Lascelles used the pen-name "Senex" when writing to The Times in 1950 setting out the so-called Lascelles Principles concerning the monarch's right to refuse a prime minister's request for a general election.