Hebdomad

Hebdomad (ἑβδομάς) may refer to:


 * On Hebdomads, a work of the Hippocratic Corpus
 * Hebdomad, a term used by Neoplatonist philosophers such as Iamblichus and Proclus in reference to the intellect
 * The Hebdomad, the seven world-creating archons in most Gnostic systems: see Archon (Gnosticism)
 * On Hebdomads (De hebdomadibus), a work of the Neoplatonist Boethius commented upon by Thomas Aquinas, in which the hebdomads are common mental conceptions or axioms
 * The Celestial Hebdomad, the archons who make up the ruling council of Mount Celestia in Dungeons & Dragons