Mamo (Tib. མ་མོ་, Wyl. ma mo; Skt. mātṛkā or matrika) — wrathful feminine deities forming part of Ekadzati’s entourage. The mamos are considered to be among the main natural forces which may respond to human misconduct and environmental misuse by creating obstacles and disease.
The Mamos constitute a very numerous class of fierce female deities. Although they predate Buddhism, they have been assimilated to the Matrika, a type of sorcerer of the charnel grounds. These black goddesses personify natural forces that become destructive when disturbed. They carry bags full of disease germs and comprise the retinue of the Great Dharma Protectresses.