Hebdomad

Hebdomad (Ancient Greek: 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#Hebdomad
• 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