descending : Idioms & Phrases
Descending constellations ∨ signs
(Astron.) , those through which the planets descent toward the south.
Webster 1913
Descending node
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noun the point at which an orbit crosses the ecliptic plane going south
WordNet
(Astron.) , that point in a planet's orbit where it intersects the ecliptic in passing southward.
Webster 1913
Descending series
(Math.) , a series in which each term is numerically smaller than the preceding one; also, a series arranged according to descending powers of a quantity.
