(obsolete) The number nine. / (rare) Any grouping or system containing nine objects.

Of, relating to, or being an ennead.

plural of ennead

(Egyptian mythology) The collection of nine gods worshipped at Heliopolis and taking part in the Heliopolitan creation myth, together representing the sum of all the elements of the created world: Atum, Shu, Tefnut, Nut, Geb, Osiris, Isis, Set, and Nephthys.

(philosophy) One of the six parts of the writings of the Greek-speaking philosopher Plotinus (c. 204–205 – 270), each containing nine treatises, compiled by his student Porphyry (c. 234 – c. 305).

plural of Ennead

plural of enneadecagon

(geometry) A polygon with nineteen sides and nineteen angles.

(geometry) A polyhedron with nineteen faces.

nineteen