{Descending constellations} or {signs} (Astron.), those
through which the planets descent toward the south.
{Descending node} (Astron.), that point in a planet's orbit
where it intersects the ecliptic in passing southward.
{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.