无量寿佛是梵语“阿弥陀佛”的意译，又称“长寿佛”，具有增福延寿的现世利益和功德。

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Amitayus, of the Aparimitagunasamchaya or Amitavyūhavatī pure realm, is typically depicted in the apparitional buddha form (sambhogakaya), red in colour, wearing a crown and jewels, holding a long life vase above the two hands placed in a gesture of meditation. In the Mahayana Tradition of Buddhism a buddha is described as having three bodies: a form body (nirmanakaya), an apparitional body (sambhogakaya) and an ultimate truth body (dharmakaya). 

In the Himalayan and Tibetan traditions there is a great deal of conflation between the two buddhas - Amitayus and Amitabha. In the early sutra literature Amitayus and Amitabha Buddha are not the same entity, or person. (For a detailed explanation of the differences between Amitayus and Amitabha see the introduction to the Aparimitāyurjñāna Sūtra: Aparimitāyus, Amitāyus, and Amitābha).

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