\De*scend"ing\, a.
Of or pertaining to descent; moving downwards.
{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.