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nodical month(nod -ă-kăl) See draconic month.
nodical month[′näd·ə·kəl ′mənth]
The average period of revolution of the moon about the earth with respect to the moon's ascending node, a period of 27 days 5 hours 5 minutes 35.8 seconds, or approximately 27¼ days. Also known as draconic month; draconitic month.