descending node

noun Astronomy.
the node through which an orbiting body passes as it moves to the south (opposed to ascending node ).

1690–1700 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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descending node

the point at which an orbit crosses the ecliptic plane going south [ant: ascending node
WordNet® 3.0, © 2006 by Princeton University.
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