This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
A polarity entry records the twofold division of the zodiac signs into an active, outward charge and a receptive, inward one, running in strict alternation from Aries onward so that every sign of one polarity sits beside two signs of the other, a division Ptolemy's Tetrabiblos treats as a basic structural fact about the zodiac rather than as a late addition to it.
An entry records which polarity a sign or a chart factor belongs to under this documented ancient scheme, active for the odd numbered fire and air signs, receptive for the even numbered earth and water signs, and states the classical vocabulary, masculine and feminine, diurnal and nocturnal, that Ptolemy's own text actually uses for the distinction, distinct from the active and receptive language, or the yang and yin language, that later and other traditions have used to describe a comparable pairing.
Where modern practice borrows yin and yang specifically to describe this Western polarity, an entry names that as a documented modern pairing of two originally separate systems' vocabulary, since Ptolemy's own scheme and the Chinese cosmological pairing arose independently of one another and answer different, though structurally similar, questions.