A lingam (IAST: liṅga, lit. "sign, symbol or mark"), sometimes referred to as linga or Shiva linga, is an abstract or aniconic representation of the Hindu god Shiva in Shaivism. The word lingam is found in the Upanishads and epic literature, where it means a "mark, sign, emblem, characteristic", the "evidence, proof, symptom" of Shiva and Shiva's power.
The lingam of the Shaivism tradition is a short cylindrical pillar-like symbol of Shiva, made of stone, metal, gem, wood, clay or precious stones. It is often represented within a disc-shaped platform, the yoni – its feminine counterpart, consisting of a flat element, horizontal compared to the vertical lingam, and designed to allow liquid offerings to drain away for collection.