all the members of a family group of people or animals over a period of time, especially when considering their shared family characteristics

Ismailis believe that a bloodline joins the Aga Khan to Mohammed. 伊斯玛仪派穆斯林相信阿迦汗和穆罕穆德属于同一血统。

This is a pedigree poodle - her bloodline is pure. 这是一条纯种的鬈毛小母狗——是纯种的。