Yoni (Sanskrit: योनि, ), sometimes called pindika, is an abstract or aniconic representation of the Hindu goddess Shakti. It is usually shown with linga – its masculine counterpart. Together, they symbolize the merging of microcosmos and macrocosmos, the divine eternal process of creation and regeneration, and the union of the feminine and the masculine that recreates all of existence. The yoni is conceptualized as nature's gateway of all births, particularly in the esoteric Kaula and Tantra practices, as well as the Shaktism and Shaivism traditions of Hinduism.
Yoni is a Sanskrit word that has been interpreted to literally mean the "womb", the "source", and the female organs of generation. It also connotes the female sexual organs such as "vagina", "vulva", and "uterus", or alternatively to "origin, abode, or source" of anything in other contexts. For example, the Vedanta text Brahma Sutras metaphorically refers to the metaphysical concept Brahman as the "yoni of the universe". The yoni with linga iconography is found in Shiva temples and archaeological sites of the Indian subcontinent and southeast Asia, as well in sculptures such as the Lajja Gauri.
Yoni appears in the Rigveda and other Vedic literature in the sense of feminine life-creating regenerative and reproductive organs, as well as in the sense of "source, origin, fountain, place of birth, womb, nest, abode, fire pit of incubation". Other contextual meanings of the term include "race, caste, family, fertility symbol, grain or seed". It is a spiritual metaphor and icon in Hinduism for the origin and the feminine regenerative powers in the nature of existence. The Brahma Sutras metaphorically calls the metaphysical concept Brahman as the "yoni of the universe", which Adi Shankara states in his commentaries means the material cause and "source of the universe".
According to Indologists Constance Jones and James D. Ryan, the yoni symbolizes the female principle in all life forms as well as the "earth's seasonal and vegetative cycles", thus is an emblem of cosmological significance.