bloodline

plural bloodlines

1. The abstract link between a person and their ancestors.

   For centuries in Britain, the country’s noblemen have sat in parliament by virtue of their bloodline – but not for much longer.

   2024 July 20, Harriet Sherwood, “The last of the hereditary peers in the House of Lords”, in The Guardian, →ISSN

2. The pedigree of an animal.
3. By extension, the predecessors of a particular item or product.

   No other Sport Utility Vehicle has a bloodline like the Cayenne.

   2002, Tampa Bay Magazine - Sep-Oct 2002, volume 17, number 5, page 63

4. A line of dark red muscle running down the middle of a fish.