Definition of retrogradation in English:

retrogradation

noun ˌrɛtrəʊɡrəˈdeɪʃ(ə)nˌrɛtroʊɡreɪˈdeɪʃ(ə)n

mass nounAstronomy Astrology

1The apparent temporary reverse motion of a planet (from east to west), resulting from the relative orbital progress of the earth and the planet.
〔天文，占星〕（行星的）逆行
Example sentencesExamples
- The actual propositions quoted by Ptolemy as proved by Apollonius among others show mathematically at what points, under each of the two hypotheses, the apparent forward motion changes into apparent retrogradation and vice versa, or the planet appears to be stationary.
- Mars goes through apparent retrogradation every 25.7 months.
1. 1.1 The orbiting or rotation of a planet or planetary satellite in a reverse direction from that normal in the solar system.
  （行星或行星卫星的）逆行
  Example sentencesExamples
  From the sum of all these small motions will result a daily retrogradation of the points of intersection of the equator and the ecliptic that is to say, of the equinoxes; and though it is extremely small, yet, as it is daily repeated in the same direction, the effect at the end of a year will be very sensible.
  Moreover, the distance that the planet travels between one retrogradation and the next is quite variable.

Origin

Mid 16th century: from late Latin retrogradation- (see retro-, gradation).

Definition of retrogradation in US English:

retrogradation

nounˌretrōɡrāˈdāSH(ə)nˌrɛtroʊɡreɪˈdeɪʃ(ə)n

Astrology Astronomy

1The apparent temporary reverse motion of a planet (from east to west), resulting from the relative orbital progress of the earth and the planet.
〔天文，占星〕（行星的）逆行
Example sentencesExamples
- Mars goes through apparent retrogradation every 25.7 months.
- The actual propositions quoted by Ptolemy as proved by Apollonius among others show mathematically at what points, under each of the two hypotheses, the apparent forward motion changes into apparent retrogradation and vice versa, or the planet appears to be stationary.
1. 1.1 The orbiting or rotation of a planet or planetary satellite in a reverse direction from that normal in the solar system.
  （行星或行星卫星的）逆行
  Example sentencesExamples
  Moreover, the distance that the planet travels between one retrogradation and the next is quite variable.
  From the sum of all these small motions will result a daily retrogradation of the points of intersection of the equator and the ecliptic that is to say, of the equinoxes; and though it is extremely small, yet, as it is daily repeated in the same direction, the effect at the end of a year will be very sensible.

Origin

Mid 16th century: from late Latin retrogradation- (see retro-, gradation).

单词	retrogradation
释义	Definition of retrogradation in English: retrogradation noun ˌrɛtrəʊɡrəˈdeɪʃ(ə)nˌrɛtroʊɡreɪˈdeɪʃ(ə)n mass nounAstronomy Astrology 1The apparent temporary reverse motion of a planet (from east to west), resulting from the relative orbital progress of the earth and the planet. 〔天文，占星〕（行星的）逆行 Example sentencesExamples The actual propositions quoted by Ptolemy as proved by Apollonius among others show mathematically at what points, under each of the two hypotheses, the apparent forward motion changes into apparent retrogradation and vice versa, or the planet appears to be stationary. Mars goes through apparent retrogradation every 25.7 months. 1.1 The orbiting or rotation of a planet or planetary satellite in a reverse direction from that normal in the solar system. （行星或行星卫星的）逆行 Example sentencesExamples From the sum of all these small motions will result a daily retrogradation of the points of intersection of the equator and the ecliptic that is to say, of the equinoxes; and though it is extremely small, yet, as it is daily repeated in the same direction, the effect at the end of a year will be very sensible. Moreover, the distance that the planet travels between one retrogradation and the next is quite variable. Origin Mid 16th century: from late Latin retrogradation- (see retro-, gradation). Definition of retrogradation in US English: retrogradation nounˌretrōɡrāˈdāSH(ə)nˌrɛtroʊɡreɪˈdeɪʃ(ə)n Astrology Astronomy 1The apparent temporary reverse motion of a planet (from east to west), resulting from the relative orbital progress of the earth and the planet. 〔天文，占星〕（行星的）逆行 Example sentencesExamples Mars goes through apparent retrogradation every 25.7 months. The actual propositions quoted by Ptolemy as proved by Apollonius among others show mathematically at what points, under each of the two hypotheses, the apparent forward motion changes into apparent retrogradation and vice versa, or the planet appears to be stationary. 1.1 The orbiting or rotation of a planet or planetary satellite in a reverse direction from that normal in the solar system. （行星或行星卫星的）逆行 Example sentencesExamples Moreover, the distance that the planet travels between one retrogradation and the next is quite variable. From the sum of all these small motions will result a daily retrogradation of the points of intersection of the equator and the ecliptic that is to say, of the equinoxes; and though it is extremely small, yet, as it is daily repeated in the same direction, the effect at the end of a year will be very sensible. Origin Mid 16th century: from late Latin retrogradation- (see retro-, gradation).
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