("great" + "knowledge"). Ten Hindu goddesses who represent the ten forms of transcendent knowledge and tantric power. They are personifications of Brahman's Sakti, so through worship of them, one can gain knowledge of Brahman. They are: Kali, Tara, Sodasi, Bhukanesvari, Bhairavi, Chinnamasta/Viraratri, Dhumavati, Bagala, Matangi and Kamala. The Mahavidyas were especially popular in medieval Bengal.