'line of descent' definitions:

Definition of 'line of descent'

From: WordNet
noun
The kinship relation between an individual and the individual's progenitors [syn: descent, line of descent, lineage, filiation]
noun
The descendants of one individual; "his entire lineage has been warriors" [syn: lineage, line, line of descent, descent, bloodline, blood line, blood, pedigree, ancestry, origin, parentage, stemma, stock]