01 n. 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…
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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 & 4. See: Blood
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2.
A person so related to another.
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3.
A person whose father and mother are of different races; a half-breed.