From Longman Dictionary of Contemporary Englishbloodlineblood‧line /ˈblʌdlaɪn/ noun [countable] all the members of a family of people or animals over a period of time → pedigree a royal bloodline
Examples from the Corpus
bloodline• In Jude's - or Judas Thomas's - case, there is confirmation of a bloodline.• Good, bright, yet for ever passed over and having to report to some nitwit with the right school connections and bloodlines.• He knew that IsabelIa was a fair-skinned, green-eyed, red-haired woman of the best bloodline.• Jim can trace his bloodlines to the Puritans.• Wild specimens should also be bred with domesticated stock to introduce new bloodlines.• This, again, ensures that the pool of breeding stock is continually improved with the introduction of non-related bloodlines.• The Roosevelts added a dash of upper-crust eccentricity to the bloodlines that extended down to the Alsop boys of Avon.• But government through bloodline is vulnerable to the same objections whether it occurs through voting or the passing down of a crown. 