Descending

De·scend·ing

Descending

a.
  1. Of or pertaining to descent; moving downwards.

Phrases & Compounds

Descending constellations
those through which the planets descent toward the south.
Descending node
that point in a planet's orbit where it intersects the ecliptic in passing southward.
Descending series
a series in which each term is numerically smaller than the preceding one; also, a series arranged according to descending powers of a quantity.