Mudbloods

'Mudblood' is a derrogatory term for a Muggle-born wizard or witch. Muggle-borns are wizards and witches with no magical parents or grandparents, and although there does not appear to be any difference in the magical power of Muggle-borns compared to Pure-blood and Half-blood wizards, many consider them to be of lower breeding or worth. See 'Blood Purity' for more information.

The ideology that Pure-bloods are better than Mudbloods or Muggle-borns plays a central role in the story. Although in the Harry Potter series this notion is foremost in the minds of Dark Wizards, Death Eaters, and followers of Lord Voldemort and Gellert Grindlewald, it is doubtless that many well-meaning Pure-blood families believe in this predudice as well. It is notable that not all Pure-blood families support this argument, notably the Weasley family.