draconic month

短语

词形变化

draconic months 复数 draconic months

释义与例句

n.
  1. 1.

    A period of time between two consecutive passages of the Moon through the same orbital node. The draconic month is shorter than the sidereal month, due to precession of the Moon's orbit. An average one lasts 27 days, 5 hours, 5 minutes, 35.8 seconds.