Planetouched is a general word to describe someone who can trace his or her bloodline back to an outsider, usually a fiend or celestial.
The effects of having a supernatural being in one?s heritage last for many generations. Although not as dramatically altered as a half-celestial or a half-fiend, planetouched still retain some special qualities.
The two planetouched varieties described here are the most common. Aasimars are humans with some trace of celestial blood in their veins, and tieflings have some fiendishness in their family tree.

• Aasimar
  
• Tiefling
  

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System Reference Document -> List of Creatures (SRD)