Half" blood` (?).
1.
The relation between persons born of the same father or of the same mother, but not of both; as, a brother or sister of the half blood. See Blood, n., 2 and 4.
2.
A person so related to another.
3.
A person whose father and mother are of different races; a half-breed.
In the 2d and 3d senses usually with a hyphen.
© Webster 1913.