(Sanskrit मूलप्रकृति) Literally, the “root or origin of nature; primary cause or originant; original root or germ out of which matter or all apparent forms are evolved.” The abstract deific feminine principle. Undifferentiated substance.
"In the books of genesis (from all religious literature), the primordial matter (Mulaprakriti) is represented by the waters." - Samael Aun Weor, Endocrinology and Criminology
"The Chaos is the raw matter of the Great Work. The Chaos is the Mulaprakriti, the primordial matter. Mulaprakriti is christonic semen, from which the universe emerged. We have Mulaprakriti in our sexual organs, and from it springs up life." - Samael Aun Weor, Kundalini Yoga: The Mysteries of the Fire