(US) The fraction of a person's ancestors, out of their total ancestors, who are documented as full-blooded Native Americans. For instance, a person who has one parent who is a full-blood Native American and one who has no Native ancestry has a blood quantum of 1/2.

Synonym of new blood (“newcomers to a project or organization”)

As an inborn trait, especially one that one shares with other members of their family.

(hematology, cytology, immunology) A type of blood cell that is involved with an immune response, or part of the immune system.

(hematology, cytology) A type of cell in the blood of vertebrates that contains hemoglobin and transports oxygen from the lungs to the tissues; an erythrocyte.

(physiology) The highest pressure within the bloodstream, occurring during each heart beat, because of the systole.

(physiology) The lowest pressure within the bloodstream, occurring between heart beats, because of a diastole.

plural of white blood cell

plural of red blood cell

(anatomy) A structure in the central nervous system (CNS) that keeps various substances found in the bloodstream out of the brain while allowing in the substances essential to metabolic function, e.g. oxygen.