1. lines of descent or ancestry, especially of animals bred for specific traits
Usage: often used in animal breeding contexts
2. family lineage or hereditary succession in humans

Examples

• The horse’s champion bloodlines made it very valuable for breeding.
• Dog breeders carefully track bloodlines to maintain breed standards.
• The royal bloodlines can be traced back centuries.
• She researched her family’s bloodlines using genealogy websites.
• Pure bloodlines are important in livestock breeding programs.
• The ancient bloodlines of the nobility were well documented.
• Mixed bloodlines often produce healthier animals than pure breeds.