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Meaning of half blood

half' blood"

Pronunciation: [key]
  1. the relation between persons having only one common parent.

half-blood

Pronunciation: (haf'blud", häf'-), [key]
— n.
  1. a half-breed.
  2. a person who has only one parent in common with another person, as a half sister or half brother.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.