The lingam (IAST: liṅgaṃ, Hindi: लिंगम, linga, ling, phallus, Shiva linga, Shiv ling, meaning sign, symbol or mark) is an abstract or aniconic representation of the Hindu deity, Shiva, used for worship in temples, smaller shrines, or as self-manifested natural objects. In traditional Indian society, the linga is seen as a symbol of the energy and potential of Shiva himself.
The lingam is often represented alongside the yoni (Sanskrit word, literally "origin" or "source" or "womb"), a symbol of the goddess or of Shakti, female creative energy. The union of linga and yoni represents the "indivisible two-in-oneness of male and female, the passive space and active time from which all life originates".
The lingam is a column-like or oval (egg-shaped) symbol of Shiva, the Formless All-pervasive Reality, made of stone, metal, or clay. The Shiva Linga is a symbol of Lord Shiva – a mark that reminds of the Omnipotent Lord, which is formless. In Shaivite Hindu temples, the linga is a smooth cylindrical mass symbolising Shiva. It is found at the centre of the temple, often resting in the middle of a rimmed, disc-shaped structure, a representation of Shakti in Hindu terminology or energy orbitals in scientific terminology.
Anthropologist Christopher John Fuller wrote that although most sculpted images (murtis) are anthropomorphic, the aniconic Shiva Linga is an important exception. Some believe that linga-worship was a feature of indigenous Indian religion.