retrograde

Từ điển American Heritage Dictionary 4th

ret·ro·grade (rĕtʹrə-grād')adj.
1. Moving or tending backward.
2. Opposite to the usual order; inverted or reversed.
3. Reverting to an earlier or inferior condition.
4. Astronomy.
a. Of or relating to the orbital revolution or axial rotation of a planetary or other celestial body that moves clockwise from east to west, in the direction opposite to most celestial bodies.
b. Of or relating to the brief, regularly occurring, apparently backward movement of a planetary body in its orbit as viewed against the fixed stars, caused by the differing orbital velocities of Earth and the body observed.
5. Archaic. Opposed; contrary.intr.v. ret·ro·grad·ed, ret·ro·grad·ing, ret·ro·grades
1. To move or seem to move backward. See Synonyms at recede¹.
2. To decline to an inferior state; degenerate. [Middle English, from Latin retrōgradus, from retrōgradī, to go back : retrō-, retro- + -gradus, walking (from gradī, to go. See ghredh- in Indo-European Roots).] ret'ro·gra·daʹtion (-rō-grā-dāʹshən) n.retʹro·grade'ly adv.

• Từ đồng nghĩa / Synonyms:
  retral, retrogressive, regress, retrogress, rehash, hash over, retreat
• Từ trái nghĩa / Antonyms:
  anterograde, direct, progress, come on, come along, advance, get on, get along, shape up