Falling; sinking.In astrology, falling from an angle: applied to the third, sixth, ninth, and twelfth houses, which follow the meridian and the horizon.Specifically applied to the tenth of Professor H. D. Rogers's fifteen divisions of the Paleozoic strata of Pennsylvania, which suggest metaphorically the different natural periods of the day. It corresponds to the Hamilton group of the New York survey.n. In old music, a grace or embellishment consisting of an after-note one degree below the principal note: as