descent

de·scent

noun \di-ˈsent\

Definition of DESCENT

1

: the act or process of descending from a higher to a lower location <descent of the testes into the scrotum>

2

a : derivation from an ancestor b : the fact or process of originating by generation from an ancestral stock (as a species or genus)

3

: a former method of distillation in which the material was heated in a vessel having its outlet underneath so that the vapors produced were forced to descend