Concept

Waidan

Summary
Waidan, translated as 'external alchemy' or 'external elixir', is the early branch of Chinese alchemy that focuses upon compounding elixirs of immortality by heating minerals, metals, and other natural substances in a luted crucible. The later branch of esoteric neidan 'inner alchemy', which borrowed doctrines and vocabulary from exoteric waidan, is based on allegorically producing elixirs within the endocrine or hormonal system of the practitioner's body, through Daoist meditation, diet, and physiological practices. The practice of waidan external alchemy originated in the early Han dynasty (206 BCE–220 CE), grew in popularity until the Tang (618–907), when neidan began and several emperors died from alchemical elixir poisoning, and gradually declined until the Ming dynasty (1368–1644). The Chinese compound wàidān combines the common word wài 'outside; exterior; external' with dān 'cinnabar; vermillion; elixir; alchemy'. The antonym of wài is nèi meaning 'inside; inner; internal', and the term wàidān 外丹 'external elixir/alchemy' was coined in connection with the complementary term nèidān 'internal elixir/alchemy'. The sinologist and expert on Chinese alchemy Fabrizio Pregadio lists four generally accepted meanings of dan: "The color cinnabar, scarlet, or light scarlet", "The mineral cinnabar, defined as 'a red stone formed by the combination of quicksilver and sulphur'", "Sincerity (corresponding to danxin 丹心)", and "An essence obtained by the refining of a medicinal substance; a refined medicinal substance, the so-called medicine of the seekers of immortality for avoiding aging and death; a term often used for matters concerning the immortal". Pregadio concludes that the semantic field of the word dan evolves from a root-meaning of "essence", and its connotations include "the reality, principle, or true nature of an entity or its essential part, and by extension, the cognate notions of oneness, authenticity, sincerity, lack of artifice, simplicity, and concentration." The date for the earliest use of the term waidan is unclear.
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