释义 |
draconic month
draconic month n (Astronomy) astronomy the mean time taken by the moon between successive passages through the ascending node of its orbit. It is about 2.5 hours shorter than the sidereal month. Also called: nodical month draconic month
draconic month (dră-kon -ik) (nodical month) The time interval of 27.2122 days, on average, between two successive passages of the Moon through the ascending node (or descending node) of its orbit.draconic month[drə‚kän·ik ′mənth] (astronomy) nodical month |