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Nancy K. Brown Skin Dictionary letter N section
| nanometer: |
1 billionth of a meter (1 x 10-9 meters) - this is the size of nano or ultra-fine particles used in some skin care and cosmetics (not to be confused with micro-particle sized ingredients). Nancy K. Brown does not use nano-particles in any of its products. |
| nano-particle: |
a material which has been reduced in size to 1 billionth or less of a meter in diameter. This should not be confused with the micro-particle, which is a particle a few 1 millionth of a meter in diameter. Nancy K. Brown does not use nano-particles in any of its products. |
| non-comedogenic: |
will not cause the plugging or clogging of skin duct or pore. |
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