definition

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  In astrology: Astrology in the Hellenistic period (3rd century bc to 3rd century ad)

  …are further divided into four triplicities, each of which governs one of the four elements. Numerous pairs of opposites (male-female, diurnal-nocturnal, hot-cold, and others), based on the speculations of the followers of Pythagoras, a Greek mystical philosopher of the 6th century bc, are connected with consecutive pairs of signs. Finally,…

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