In the black calculations system of Tibetan astrology, a set of five elements – from among the elements of earth, water, fire, wood and metal – associated with each of the sixty animal-element combinations within a sixty-year cycle used in calculations for determining the strength of someone's life-force (srog-rdel), body (lus-rdel), power or capacity (dbang-rdel), valley of fortune (klung-rdel), and life-spirit (bla-rdel) during a specific year.
Tibetan: རྡེལ། rdel
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