53:48 · These signs were formerly used in pharmacology and the prescription of medicines written on the prescriptions. They meant to be taken, prescribed, or recipe. See , the invocation cross in Group 45, for more data.
    When used nowadays in pharmacological contexts like catalogs it indicates that a drug or medicine is not free to buy, but has to be prescribed by a certified physician. The modern meaning of thus is only a certified physician may prescribe this medicine.
    In astrological symbolism or are signs for retrograde movement. As seen from earth the planets move primarily in the same direction as the sun in the zodiac, but now and then every planet seems to come to a halt and then to begin to move backward. This apparent reversal of movement is called retrogradation. Many astrologists claim that a retrograd planet in an individual's birth chart (horoscope) symbolizes tendencies or energies inherited from previous incarnations, i.e. karma from earlier lives.