Natural
From Wikinfo
'Natural' is defined as "of or relating to nature"; this applies to both definitions of 'nature': 'essence' ("one's true nature") and 'the untouched world' ("force of nature").
'Natural' is used to describe the notes A, B, C, D, E, F, and G, as opposed to the sharps/flats.
References
- Adapted from the Wikipedia article, "Natural" http://en.wikipedia.org/wiki/Natural, used under the GNU Free Documentation License
