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blood feud an ongoing, bitter conflict or fight between families.
blood group any of several types in which human blood can be classed, each with its own inherited immunological and agglutinative characteristics; blood type.
bloodhound a large hound with a particularly keen sense of smell, long ears, and baggy skin, used chiefly for tracking humans or animals.
bloodless without, or as without, blood or enough blood; pale. [3 definitions]
bloodletting the act or practice of purging by opening a vein; phlebotomy. [2 definitions]
bloodline ancestry, esp. of animals; pedigree.
bloodmobile a mobile unit carrying medical equipment for collecting blood from donors for a blood bank.
blood money a fee paid to a hired assassin. [3 definitions]
blood poisoning the presence and persistence in the blood of impurities or toxins; septicemia; toxemia.
blood pressure the pressure of the blood against the inner wall of blood vessels, esp. the arteries or the heart, as exerted by the contractions of the heart muscles, often measured as an indicator of physical health.
blood pudding a sausage made from pig's blood and suet.
blood relation a person to whom one is related by birth; blood relative.
bloodroot a North American spring wildflower that bears a single white flower and has a fleshy red root that yields a toxic red sap.
bloodshed the spilling of blood through injury or violence, esp. the destruction of living beings; warfare.
bloodshot (of eyes) showing dilated blood vessels; red and irritated.
bloodstain a discoloration or mark left by blood.
bloodstained stained with blood. [2 definitions]
bloodstone a semiprecious green or greenish quartz flecked with red jasper; heliotrope.
bloodstream the blood flowing within the circulatory system of a living organism.
bloodsucker an animal that sucks blood from others, esp. a leech; parasite. [2 definitions]
blood test any test of the blood, as to determine type, red or white blood count, or the presence of antibodies or bacteria.